Specification: Top Diameter: 2.5" Bottom Diameter: 1" Length: 4" Suits Hulls Upto: 38MM Product Code: SFNPDS28 Robust Boat Drain Socket Our Drain Socket fixes into your boat’s hull and is installed through the transom, ideal for livewell installations or as an exhaust port for a bilge pump. It’s constructed to be resistant to degradation from chemicals or salt water making it perfect for the hull of your boat. Our Socket can easily be opened for cleaning. Product Code D (mm) DI (mm) H (mm) di (mm) d1 (mm) d (mm) d1 (Inch) SFNPDS28 63.8 23.4 94 20.4 28.2 31.1 1 - 1/8 SFNPDS52 90 48.9 130 42 50.8 56.6 2 SFNPDS03W 60.6 25.5 93 17.4 25 32.5 1