Marelon Full-Flow Seacock 2 Mushroom Through-HullThis integrated 2-part system comes complete with a Marelon valve and properly matched mushroom head thru-hull with super strong buttress type threading. This new package is designed to eliminate valve and thru-hull thread style mismatches and associated cross-threading for after market installations common when customers select individual parts from bins.FeaturesSystem Includes Full Flow Seacock With Integrated Hose Connector and Mushroom Thru H