JR Products (497-AB-3P-A Black City/Gravity Water Hatch Gravity spout accepts either 1-1/4 or 1-3/8 water fill hose Plastic check valve with 1/2" MPT Includes a tank vent connection UV and impact resistant, resists road salts and acids Cutout Dimensions: 3-3/4" H x 6" W; Outside Dimensions: 5-5/16" H x 7-9/16" W; Total Depth: 2-1/2"