169mm Outside Diameter x 160mm Inside Diameter, Specialist Woodworking & Timber Processing PU Ducting, 10 Metres, TIMBERDUC PUR 533 AS, Wall Thickness 0.7mm, Weight 1.460 Kg per Metre, Maximum Vacuum Pressure 0.070 bar, Working Temperature -40°C to +90°C, Working Pressure 0.400 bar, Norres