Supply Air 12x8x4 Corrugated Cardboard Shipping Boxes – Brown Kraft Mailer Boxes for Packing, Moving & Storage (Multiple Pack Sizes)

Highlights

• CONSTRUCTION: Single-wall corrugated cardboard with 32 ECT (Edge Crush Test) rating and brown kraft linerboard exterior.
• DIMENSIONS: Assembled box measures 12 inches length x 8 inches width x 4 inches height exterior. Interior usable space accommodates items up to 11.75 x 7.75 x 3.75 inches, providing clearance for cushioning materials and void fill
• WEIGHT: Each individual box weighs approximately 0.5 pounds when flat (knocked down). Total pack weight scales with quantity selected: 25-pack weighs 12.5 lbs, 50-pack weighs 25 lbs, 100-pack weighs 50 lbs
• CLOSURE: Four-flap design on top and bottom panels. Flaps interlock by folding inward along pre-scored creases. Sealing requires tape or adhesive strip applied across the center seam where flaps meet
• ASSEMBLY: Boxes ship flat (knocked down) to minimize storage volume. Assembly process: pop open the collapsed box along fold lines, fold bottom flaps inward in sequence (side flaps first, then end flaps), secure bottom with tape, insert contents, fold and tape top flaps

Description

Supply Air 12x8x4 Corrugated Shipping Boxes are constructed from single-wall corrugated cardboard with a 32 ECT (Edge Crush Test) rating. Each box measures 12 inches in length, 8 inches in width, and 4 inches in height when assembled. The brown kraft exterior provides a neutral appearance suitable for commercial shipping, retail fulfillment, and personal moving applications. These boxes ship flat (knocked down) to reduce storage space and are assembled by folding along pre-scored creases and securing the bottom flaps. The rectangular shape accommodates items measuring up to 11.75 x 7.75 x 3.75 inches interior dimensions, allowing clearance for packing materials. Each box weighs approximately 0.5 pounds when flat. The top and bottom close by interlocking four flaps; tape or adhesive is required to seal closures. This listing covers multiple pack quantity options: 25-pack, 50-pack, and 100-pack configurations are available to match order volume requirements. All boxes are manufactured in the United States from and virgin kraft paperboard. Pack contents ship in a banded bundle for flat-packed boxes or nested stacks for assembled units.