Water fill deck plate for a 1.5" hose. Chrome plated zinc alloy. Black plastic cap. Deck plate key and o-ring included. For Hose Size: 1-1/2"; O.D. Flange: 3-1/4"; Length of Neck : 2-1/2 "; Mounting Hole Dia.: 2-1/8 "; Screw Size: #8;