Handy snap-on closure system protects your skimmer from freeze damage and saves thousands of gallons of water a year. Simply replace your existing skimmer plate with the Aquador fuse plate and snap on the plastic lid. USA. How to fit your Aquador: Hayward-type Skimmers: Inside Dimen.5-7/8inW x 5-1/2inH Outside Dimen.8-1/4inW x 8inH Widemouth Skimmers: Inside Dimen.11-1/2inW x 5-1/4inH Outside Dimen.14-1/8inW x 7-3/4inH Doughboy Skimmers: Inside Dimen.7-5/8inW x 5-5/8inH Outside Dimen.11-1/8W x 7-5/8inH