Molded from polypropylene with glass fiber for strength. Not recommended for use below the waterline.STAINLESS STEEL COVERED 90° THRU-HULL (SEACHOICE)SKU: 7.19249E+11$23.95PriceQuantity*Add to CartFeaturesHose1-1/2"Flange2-3/8"Max Hull1-3/8"