Key Features Specs Warranty Over time your Thomas AP-60 will need to be repaired do to the diaphragm failing from moving back and fourth billions of times. This kit comes with all the parts you will need to properly do rebuild your aerator and achieve maximum performance. Kit includes: Two chamber blocks Two diaphragms Four magnet shims to properly hold the magnet in place Chamber block gaskets Base gaskets Filter gaskets One filter Magnet housing gasket.