Specification Brand : Ucanpack BreakingStrength : 200 pounds BulletPoint1 : 23 x 21" B flute apx. 1/8" thickness corrugated cardboard sheets proudly made in the USA. BulletPoint2 : Both sides (Top & Back) feature black cardstock corrugated sheets BulletPoint3 : These All Black Corrugated Cardboard Sheets can be used as craft supplies, display inserts or to separate items and for kids school projects BulletPoint4 : SUSTAINABLE & ENVIRONMENTALLY RESPONSIBLE - All our corrugated boards are sourced sustainably, and all our boxes are crafted from 100% recycled materials ensuring that your business can stay sustainable while still meeting your shipping needs. BulletPoint5 : CUSTOMIZABLE - Ucanpack offers wide range of sizes and color options to choose from. If you looking for a CUSTOM CORRUGATED CARDBOARD SHEETS for your brand, business or crafts and gifting purposes, be it size, color or design, we can get that made and customized. Color : All Black ItemName : Ucanpack 100 Pack Black Corrugated Cardboard Sheet 23x21", Made in USA- Colored Corrugated Sheets For DIY Crafts Supplies, Inserts, Shipping, Dividers, Mailing, School Projects (B Flute) ItemPackageQuantity : 100 ItemShape : Rectangular ItemTypeKeyword : professional-business-corrugated-packaging-pads Manufacturer : Ucanpack Material : Cardboard, Corrugated Cardboard, Cardstock ModelName : All Black Corrugated Cardboard Sheet (B flute) ModelNumber : All Black Cardboard Sheet (B flute) NumberOfBoxes : 1 NumberOfItems : 100 PartNumber : PD23X21_abb Pattern : All Black Corrugated Cardboard Sheet (B flute) ProductSiteLaunchDate : 2024-11-14T07:17:45.349Z Size : 23 x 21" Style : Full Black Corrugated Cardboard Sheet USA SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 100 UnspscCode : 24121500