Seachoice Thru-Hull Connectors are made of durable polypropylene and glass fiber to withstand the rigors of marine environments. They are ideal for use as an exhaust port for a bilge pump. Seachoice is committed to delivering quality marine accessories and OEM replacement parts to satisfy fishing, boating and watersports enthusiasts worldwide. Seachoice is run for and by boaters, offering a wide-ranging product line while remaining affordable. Made of durable polypropylene and glass fiber to withstand the rigors of marine environmentsStainless-steel flange provides excellent corrosion resistanceIdeal for use as an exhaust port for a bilge pumpFor use with a 3/4-inch ID hoseFits hulls up to 1-3/8 inches thickNot recommended for use below the waterlineManufacturer part number 50-18441