THIS ABILITYONE ITEM IS EQUIVALENT TO THE FOLLOWING MODELS: ARMBRUST PAPER TUBES PT20018 ULINE S2638 ARMBRUST PAPER TUBES WT20018. Mailing Tube 18 x 2 Untreated chipboard mailing tube is ideal for the shipment and storage of maps, blueprints and drawings. Meets strict government requirements for crush resistance. Tube has tightfitting, slipover telescoping covers with metal ends and spiralwound construction. Contains 99% postconsumer recovered materials. 24 tubes per box. Thick, strong tubes for heavyduty shipping jobs Adjustable length saves storage space End caps are preattached tube loads and seals from the middle Joint cap seals easily with tape or shipping label SDS SHEETS: Yes. ENVIRONMENTAL SUSTAINABILITY (GREEN) INFO: Recyclable: Yes. PreConsumer Recycled Content: 0