Perko Chromalex 1.5" Gas Fill with Locking Cap Chrome plated zinc. Black plastic flange and cap. Complete with grounding screw, cap retainer and gasket. Locking cap has a cover for the key hole. Hose size 1-1/2. Flange OD 3-1/8. Neck length 1-7/8. Uses #6 fasteners. (S)