CPR Wet Dry filters are designed for long term reliability and ease of operation. Easily fits under your aquarium with its compact size. Simple installation and operation. Efficient drip plate or drip lid dispersal. Special designed vented lids to allow for proper gas exchange and not to warp. CR500 is designed for up to 60 gallons. 16" L x 8" W x 12" H. Inlet 3/4" bulk head.