83mm Outside Diameter x 75mm Inside Diameter, Specialist Woodworking & Timber Processing PU Ducting, 10 Metres, TIMBERDUC PUR 532 AS, Wall Thickness 0.6mm, Weight 0.530 Kg per Metre, Maximum Vacuum Pressure 0.145 bar, Working Temperature -40°C to +90°C, Working Pressure 0.550 bar, Norres