YANYU 1-1/2 (38 mm) WATER Boat Deck Fill/Filler Flip Tab Key Less Cap Marine 316 Stainless Steel Yacht Caravan with Screws ,Spare O-Ring and Rubber Gasket The outer diameter of the deck fill tube is 1-1/2 (38.8mm); The length of deck fill tube is 3.15 (80mm); The outside diameter of the deck filler flange is 3 (76mm) ; Need 3 pieces of 4.825mm screws for flush installation (included); Name plate with WATER letter on the filler face,easy to view and use. Convenient, keyless design - lift built-in tab on cap and turn to open or close. The lid is attached to the body with a stainless steel chain to prevent the lid from being lost. The material is 316 Stainless Steel,effectively prevent the corrosion of seawater salt and maintain a good anti-rust effect; The surface is hand mirror polished,the surface is smooth and beautiful.Recess flush to deck for contemporary look; Package Includes: 1-1/2 WATER Deck Filler (SS 316) X 1; 4.825mm Screws (SS 316) X 3 ; Rubber Spare O-Ring X 1; Rubber Gasket X 1 ;