Sierra Shields Bilgeflex Hose 1-18 - White Sierra Shields Bilgeflex Hose is a single layer corrugated polyethylene hose. The hose is resistant to mild chemicals and salt water and there is a clamping cuff every foot. Specifications I.D. 1 18 or 28.6mm Bend Radius 1 or 25.4mm Vac Rating 20 Length 50 or 15.2m Application This hose is primarily used for bilge pump discharge Note Do not attach to thru hull fitting below the water line. California Residents WARNING Cancer and Reproductive Harm - P65W