21 x 15 x 15 Corrugated Boxes

- Use for packing, shipping, and storing products
- Easy to set up, load, and close
- Shipped flat for freight savings
- Bundle/bale quantity: 20 / 140 lbs./bundle
- Dimensions: Outside - 21 3/8 x 15 3/8 x 15 5/8 (+/- 1/8)
- All boxes meet ASTM D5118 standards
- Recommended by UPS for shipping up to 40 lbs.
- 200# test boxes are 60% stronger than 32 ECT boxes
- Seams are glued and boxes open along the length
- Pound test refers to bursting strength, ECT refers to stacking strength
- Box strength guidelines: (maximum weight per box)
- 32 ECT single wall: 65 lbs.
- 200# single wall: 65 lbs.
- 275# single wall: 95 lbs.
- 350# single wall: 120 lbs.
- 200# double wall: 80 lbs.
- 275# double wall: 100 lbs.
- 350# double wall: 120 lbs.
- 500# double wall: 160 lbs.
- All FedEx and UPS dimensional weight: 37 lbs.
- Material: All 200# kraft test boxes are C flute except:
- B flute: S-13287 (3 x 3 x 3)
- S-16725 (4 x 4 x 3)
- S-4040 (4 x 4 x 4)
- S-19037 (4 x 4 x 5)
- S-4050 (5 x 5 x 5)
- An alternative for lightweight shipments.