●2" DIAMETER - Fits 50mm (2") diameter fuel hose ,the detail size refer to the picture. ●316 STAINLESS STEEL MATERIAL - strong corrosion resistance, durable in saltwater circumstance. ●KEYLESS DESIGN - you can just lift tab on cap and turn to open or close. ●Easy to install. ●WIDE APPLICATION - suitable for Boats and yachts, Caravans/campervans, Motorhomes, Trucks, Tractors