ITEM NAME:316 Stainless Steel 3/4" Hose Thru Hull Fitting for Marine Boat Yacht Kayak Description: 3/4" Marine Boat Thru Hull Fitting Marine-Grade 316 Stainless Steel Corrosion and durability in the saltwater environment. Height: Approx. 63mm / 2.48 inch Great accessories for boat/marine/yacht/kayak Specification: Top Center hole diameter: 19mm / 3/4inch Bottom hole diameter: 15mm / 0.59 inch Package Includes: 1 Piece 3/4" Boat Thru Hull Fitting Note: 1. Please check as much as possible to make sure the item is the one that you need. 2. Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm).Great accessories for boat/marine/yacht/kayak. 3/4" Marine Boat Thru Hull Fitting. 1 Piece 3/4" Boat Thru Hull Fitting. Marine-Grade 316 Stainless Steel. Height: Approx.