POWERTEC 70144 Heavy Duty 2-1/2-Inch x 20-Foot PVC Flexible Dust Collection Hose, Clear Color Made of high grade PVC with reinforced spring steel in the wall for greater durability Temperature resistant up to 176F Ideal for sawdust, powder and ventilation 2-1/2-Inch x 20 foot long, clear color Flame retardant according to UL94-HB