Universal Fit 3/4" Marine Bilge Hose Bilgeflex 120-0342B Midnight Marine Bilge flex Hose is a single layer corrugated polyethylene hose. It is resistant to mild chemicals and salt water and there is a clamping cuff every foot. It is available in black. This hose is primarily used for bilge pump discharge. Do not attach to thru hull fitting below the water line.