T-H Marine is the ORIGINAL source of stainless aerator screensThese screw-on stainless steel wire mesh strainers are designed to provide effective, dependable protection against trash or fish scales which could clog drains in bait wells or pump impellers in aeration systems.Made from formed stainless steel wire mesh cloth and then molded into a PVC base with internal threads this unit is non-corrosive, functional and looks extremely good installed on any boat. AS-1: Used on any aerator pump intake. Simply screws onto threaded pump intake in livewell or on exterior of boat. Thread: 3/4"-14