Polyester material reinforced with Aramide (Kevlar). Vulcanized with hot temperature under pressure in one operation. Non-slip surface providing maximum friction when stacking two lifting bag. Sizes: 305 x 305 mm. Thickness: 25 mm. Lifting capacity: 6.4 t. Max. stroke: 165 mm. Max. air requirement: 39.6 L. Max. inflation pressure: 8 bar. Test pressure: 12 bar. Weight: 1.95 kg.