ITEM NAME:1/2" Inch Thru Hull Bilge Pump and Aerator Hose Fitting for Boats Steel Description: 100% Brand Newï ¼ ï ¼ ï ¼ 1/2" Marine Boat Thru Hull Fitting Marine-Grade 316 Stainless Steel Corrosion and durability in the saltwater environment. Great accessories for boat/marine/yacht/kayak. Specification: Height: Approx. 57mm / 2.24 inch Package Includes: 1 Piece Boat Thru Hull Fitting.1/2" Marine Boat Thru Hull Fitting. 1 Piece Boat Thru Hull Fitting. Marine-Grade 316 Stainless Steel. Height: Approx.