Why is Edge Crush Test (ECT) more important than Mullen Burst for master export cartons?

Mullen Burst measures the force required to puncture the box sidewall, which matters for individual parcel conveyor handling. ECT measures the top-to-bottom column compression strength. In international sea containers where pallets are stacked 8 to 10 layers high, ECT dictates whether the bottom carton collapses under 500+ kg dynamic maritime loads.

How do you prevent master cartons from softening during ocean transit across the equator?

Ocean freight often exposes cargo to 85-90% relative humidity. We formulate our corrugating adhesive with cross-linking waterproofing resins and apply a Cobb 60 moisture-resistant sizing to the outer kraft liners, keeping water absorption below 26 g/m² and maintaining 92% structural rigidity.

Can NaikePack calculate optimal carton dimensions to maximize container stuffing?

Yes. Our packaging engineers utilize our interactive CBM container optimization framework to adjust your master carton dimensions by 10-15 mm to match ISO standard pallets (1200x1000mm or 1200x800mm), eliminating dead headspace and lowering sea freight expenditure by up to 28%.

Heavy-Duty Master Shipping Cartons & Export Boxes

Direct Manufacturing Catalog

50 Standard Physical Heavy-Duty Master Shipping Cartons Specifications

Select standard pre-tooled sizes below to waive initial knife-die tooling charges, or request custom parametric dielines adapted to your exact retail dimensions.

SKU	Specification Name	Dimensions (L × W × H)	Material / Caliper	Crush Strength	Est. CBM	Pilot MOQ	Action
NK-SC-01	Series 01 Master Shipping Export Box (308x206x205mm)	`308 x 206 x 205 mm (12.1 x 8.1 x 8.1 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	46 ECT	13.0068 m3	500 pcs	Quote SKU
NK-SC-02	Series 02 Master Shipping Export Box (316x212x210mm)	`316 x 212 x 210 mm (12.4 x 8.3 x 8.3 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	48 ECT	14.0683 m3	500 pcs	Quote SKU
NK-SC-03	Series 03 Master Shipping Export Box (324x218x215mm)	`324 x 218 x 215 mm (12.8 x 8.6 x 8.5 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	50 ECT	15.1859 m3	500 pcs	Quote SKU
NK-SC-04	Series 04 Master Shipping Export Box (332x224x220mm)	`332 x 224 x 220 mm (13.1 x 8.8 x 8.7 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	52 ECT	16.361 m3	500 pcs	Quote SKU
NK-SC-05	Series 05 Master Shipping Export Box (340x230x225mm)	`340 x 230 x 225 mm (13.4 x 9.1 x 8.9 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	54 ECT	17.595 m3	500 pcs	Quote SKU
NK-SC-06	Series 06 Master Shipping Export Box (348x236x230mm)	`348 x 236 x 230 mm (13.7 x 9.3 x 9.1 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	44 ECT	18.8894 m3	500 pcs	Quote SKU
NK-SC-07	Series 07 Master Shipping Export Box (356x242x235mm)	`356 x 242 x 235 mm (14.0 x 9.5 x 9.3 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	46 ECT	20.2457 m3	500 pcs	Quote SKU
NK-SC-08	Series 08 Master Shipping Export Box (364x248x240mm)	`364 x 248 x 240 mm (14.3 x 9.8 x 9.4 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	48 ECT	21.6653 m3	500 pcs	Quote SKU
NK-SC-09	Series 09 Master Shipping Export Box (372x254x245mm)	`372 x 254 x 245 mm (14.6 x 10.0 x 9.6 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	50 ECT	23.1496 m3	500 pcs	Quote SKU
NK-SC-10	Series 10 Master Shipping Export Box (380x260x250mm)	`380 x 260 x 250 mm (15.0 x 10.2 x 9.8 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	52 ECT	24.7 m3	500 pcs	Quote SKU
NK-SC-11	Series 11 Master Shipping Export Box (388x266x255mm)	`388 x 266 x 255 mm (15.3 x 10.5 x 10.0 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	54 ECT	26.318 m3	500 pcs	Quote SKU
NK-SC-12	Series 12 Master Shipping Export Box (396x272x260mm)	`396 x 272 x 260 mm (15.6 x 10.7 x 10.2 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	44 ECT	28.0051 m3	500 pcs	Quote SKU
NK-SC-13	Series 13 Master Shipping Export Box (404x278x265mm)	`404 x 278 x 265 mm (15.9 x 10.9 x 10.4 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	46 ECT	29.7627 m3	500 pcs	Quote SKU
NK-SC-14	Series 14 Master Shipping Export Box (412x284x270mm)	`412 x 284 x 270 mm (16.2 x 11.2 x 10.6 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	48 ECT	31.5922 m3	500 pcs	Quote SKU
NK-SC-15	Series 15 Master Shipping Export Box (420x290x275mm)	`420 x 290 x 275 mm (16.5 x 11.4 x 10.8 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	50 ECT	33.495 m3	500 pcs	Quote SKU
NK-SC-16	Series 16 Master Shipping Export Box (428x296x280mm)	`428 x 296 x 280 mm (16.9 x 11.7 x 11.0 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	52 ECT	35.4726 m3	500 pcs	Quote SKU
NK-SC-17	Series 17 Master Shipping Export Box (436x302x285mm)	`436 x 302 x 285 mm (17.2 x 11.9 x 11.2 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	54 ECT	37.5265 m3	500 pcs	Quote SKU
NK-SC-18	Series 18 Master Shipping Export Box (444x308x290mm)	`444 x 308 x 290 mm (17.5 x 12.1 x 11.4 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	44 ECT	39.6581 m3	500 pcs	Quote SKU
NK-SC-19	Series 19 Master Shipping Export Box (452x314x295mm)	`452 x 314 x 295 mm (17.8 x 12.4 x 11.6 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	46 ECT	41.8688 m3	500 pcs	Quote SKU
NK-SC-20	Series 20 Master Shipping Export Box (460x320x300mm)	`460 x 320 x 300 mm (18.1 x 12.6 x 11.8 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	48 ECT	44.16 m3	500 pcs	Quote SKU
NK-SC-21	Series 21 Master Shipping Export Box (468x326x305mm)	`468 x 326 x 305 mm (18.4 x 12.8 x 12.0 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	50 ECT	46.5332 m3	500 pcs	Quote SKU
NK-SC-22	Series 22 Master Shipping Export Box (476x332x310mm)	`476 x 332 x 310 mm (18.7 x 13.1 x 12.2 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	52 ECT	48.9899 m3	500 pcs	Quote SKU
NK-SC-23	Series 23 Master Shipping Export Box (484x338x315mm)	`484 x 338 x 315 mm (19.1 x 13.3 x 12.4 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	54 ECT	51.5315 m3	500 pcs	Quote SKU
NK-SC-24	Series 24 Master Shipping Export Box (492x344x320mm)	`492 x 344 x 320 mm (19.4 x 13.5 x 12.6 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	44 ECT	54.1594 m3	500 pcs	Quote SKU
NK-SC-25	Series 25 Master Shipping Export Box (500x350x325mm)	`500 x 350 x 325 mm (19.7 x 13.8 x 12.8 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	46 ECT	56.875 m3	500 pcs	Quote SKU
NK-SC-26	Series 26 Master Shipping Export Box (508x356x330mm)	`508 x 356 x 330 mm (20.0 x 14.0 x 13.0 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	48 ECT	59.6798 m3	500 pcs	Quote SKU
NK-SC-27	Series 27 Master Shipping Export Box (516x362x335mm)	`516 x 362 x 335 mm (20.3 x 14.3 x 13.2 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	50 ECT	62.5753 m3	500 pcs	Quote SKU
NK-SC-28	Series 28 Master Shipping Export Box (524x368x340mm)	`524 x 368 x 340 mm (20.6 x 14.5 x 13.4 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	52 ECT	65.5629 m3	500 pcs	Quote SKU
NK-SC-29	Series 29 Master Shipping Export Box (532x374x345mm)	`532 x 374 x 345 mm (20.9 x 14.7 x 13.6 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	54 ECT	68.644 m3	500 pcs	Quote SKU
NK-SC-30	Series 30 Master Shipping Export Box (540x380x350mm)	`540 x 380 x 350 mm (21.3 x 15.0 x 13.8 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	44 ECT	71.82 m3	500 pcs	Quote SKU
NK-SC-31	Series 31 Master Shipping Export Box (548x386x355mm)	`548 x 386 x 355 mm (21.6 x 15.2 x 14.0 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	46 ECT	75.0924 m3	500 pcs	Quote SKU
NK-SC-32	Series 32 Master Shipping Export Box (556x392x360mm)	`556 x 392 x 360 mm (21.9 x 15.4 x 14.2 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	48 ECT	78.4627 m3	500 pcs	Quote SKU
NK-SC-33	Series 33 Master Shipping Export Box (564x398x365mm)	`564 x 398 x 365 mm (22.2 x 15.7 x 14.4 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	50 ECT	81.9323 m3	500 pcs	Quote SKU
NK-SC-34	Series 34 Master Shipping Export Box (572x404x370mm)	`572 x 404 x 370 mm (22.5 x 15.9 x 14.6 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	52 ECT	85.5026 m3	500 pcs	Quote SKU
NK-SC-35	Series 35 Master Shipping Export Box (580x410x375mm)	`580 x 410 x 375 mm (22.8 x 16.1 x 14.8 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	54 ECT	89.175 m3	500 pcs	Quote SKU
NK-SC-36	Series 36 Master Shipping Export Box (588x416x380mm)	`588 x 416 x 380 mm (23.1 x 16.4 x 15.0 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	44 ECT	92.951 m3	500 pcs	Quote SKU
NK-SC-37	Series 37 Master Shipping Export Box (596x422x385mm)	`596 x 422 x 385 mm (23.5 x 16.6 x 15.2 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	46 ECT	96.8321 m3	500 pcs	Quote SKU
NK-SC-38	Series 38 Master Shipping Export Box (604x428x390mm)	`604 x 428 x 390 mm (23.8 x 16.9 x 15.4 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	48 ECT	100.8197 m3	500 pcs	Quote SKU
NK-SC-39	Series 39 Master Shipping Export Box (612x434x395mm)	`612 x 434 x 395 mm (24.1 x 17.1 x 15.6 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	50 ECT	104.9152 m3	500 pcs	Quote SKU
NK-SC-40	Series 40 Master Shipping Export Box (620x440x400mm)	`620 x 440 x 400 mm (24.4 x 17.3 x 15.7 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	52 ECT	109.12 m3	500 pcs	Quote SKU
NK-SC-41	Series 41 Master Shipping Export Box (628x446x405mm)	`628 x 446 x 405 mm (24.7 x 17.6 x 15.9 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	54 ECT	113.4356 m3	500 pcs	Quote SKU
NK-SC-42	Series 42 Master Shipping Export Box (636x452x410mm)	`636 x 452 x 410 mm (25.0 x 17.8 x 16.1 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	44 ECT	117.8635 m3	500 pcs	Quote SKU
NK-SC-43	Series 43 Master Shipping Export Box (644x458x415mm)	`644 x 458 x 415 mm (25.4 x 18.0 x 16.3 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	46 ECT	122.4051 m3	500 pcs	Quote SKU
NK-SC-44	Series 44 Master Shipping Export Box (652x464x420mm)	`652 x 464 x 420 mm (25.7 x 18.3 x 16.5 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	48 ECT	127.0618 m3	500 pcs	Quote SKU
NK-SC-45	Series 45 Master Shipping Export Box (660x470x425mm)	`660 x 470 x 425 mm (26.0 x 18.5 x 16.7 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	50 ECT	131.835 m3	500 pcs	Quote SKU
NK-SC-46	Series 46 Master Shipping Export Box (668x476x430mm)	`668 x 476 x 430 mm (26.3 x 18.7 x 16.9 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	52 ECT	136.7262 m3	500 pcs	Quote SKU
NK-SC-47	Series 47 Master Shipping Export Box (676x482x435mm)	`676 x 482 x 435 mm (26.6 x 19.0 x 17.1 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	54 ECT	141.7369 m3	500 pcs	Quote SKU
NK-SC-48	Series 48 Master Shipping Export Box (684x488x440mm)	`684 x 488 x 440 mm (26.9 x 19.2 x 17.3 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	44 ECT	146.8685 m3	500 pcs	Quote SKU
NK-SC-49	Series 49 Master Shipping Export Box (692x494x445mm)	`692 x 494 x 445 mm (27.2 x 19.4 x 17.5 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	46 ECT	152.1224 m3	500 pcs	Quote SKU
NK-SC-50	Series 50 Master Shipping Export Box (700x500x450mm)	`700 x 500 x 450 mm (27.6 x 19.7 x 17.7 in)`	300gsm Kraft Liners with Heavy Duty Double Wall Fluting	48 ECT	157.5 m3	500 pcs	Quote SKU

• All 50 specifications above are actively manufactured in our 35,000 m² Jinjiang facility under FSC-C158941 chain of custody. Custom CMYK + Pantone branding available on all runs.

Heavy-Duty Master Transit Cartons Engineered for Sea Freight

50 Standard Physical Heavy-Duty Master Shipping Cartons Specifications

Technical & Procurement FAQ

Request an Itemized Heavy-Duty Master Shipping Cartons Quotation