Sierra Shields Bilgeflex Hose 1-1/2" - BlackSierra 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 1/2" or 38.1mm; Bend Radius: ; 2" or 50.8mm; Application: This hose is primarily used for bilge pump discharge;