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Seachoice Garboard Drain Plug, Stainless Steel, Fits 1/2 In. Pipe, Includes Flange and Plug shurlok Ports are 3/8" NPT internalThe Seachoice Garboard Drain Plug is designed to securely plug a drain hole when the boat is afloat, to be opened when it's on the hard to let out rainwater. Stainless steel construction offers excellent corrosion resistance. 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