Chrome plated bronze cap and body Flange has embossed function label; cap is unmarked and has a slot between the holes Gas fills meet US Coast Guard 33 CFR 183 & CE requirements for gasoline fuel systems Fill hose: 1-1/2" Neck length: 3-1/2" Deck flange outside diameter: 3-1/8" Ground wire required Includes black plastic Fig. 1248 deck plate key and cap retainer For matching Waste Deck Fill: see Fig. 0507 Replacement O-ring: PKO 0520DP099B CE marked Made in USA