Gravity water fill is mounted in durable plastic hatch with a key lock for added security and comes with a new cap, strap and spout for a complete replacement. Hatch will not fade or discolor and is resistant to road salts and acids. Hatch is paintable to match any exterior. Dimensions: Cut Out Dim. 4-3/4" x 4-1/4" Outside Dim. 6-1/2" x 6"