257mm Outside Diameter x 250mm Inside Diameter, Food Grade Hose & Ducting, 10 Metres, AIRDUC PUR 350 FOOD-AS, Wall Thickness 0.7mm, Weight 2.310 Kg per Metre, Maximum Vacuum Pressure 0.045 bar, Working Temperature -40┬░C to +90┬░C, Working Pressure 0.255 bar, Norres