A great solution to provide a scupper check valve in the drain line. Allows use of standard thru-hull fittings in the cockpit and on the hull exterior. Features Hose Size 34, 1-18, and 1-12 Double Barb Inline Scupper- Black Prevents Backwash Chemical Resistant Materials Thermo-Plastic Flapper California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Details Google Product Type Thru Hulls Wiser Yes Fast Ship In Stock Ships Today