Gas Fill w/ Locking Cap for 1-1/2" Hose(0599). Chrome Plated Zinc Alloy Flange. Black Plastic Body. Black Plastic Cap w/ Strap. Grounding Screw Included. Cap Retainer and Gasket. Locking Cap has a cover for the key hole. Tech Info. for Hose Size: 1-1/2". O.D. Flange: 3-1/8". Length of Neck: 3-1/8". Mounting Hole Dia.: 2-1/8". Screw Size: #8