Radiator Trap Cage Unit Item Cage Unit Type Diaphragm Material Stainless Steel Used On Item 1/2 to 3/4 Inch Float and Thermostatic Radiator Trap Pressure Rating 25 PSIG Features / Benefits Single Source for All Thermostatic Trap Elements Available for Over 1000 Makes and Models One-Piece Repair Reduces Maintenance Time and Aggravation No Special Tools Needed for Installation The Only Repair Element Available Today that is Calibrated to Ensure Maximum Sensitivity in the Field Every Element is Factory Tested, Improves Original Trap's Performance with a Payback in Fuel Savings within Weeks Over 100 Years Repairing Millions of Steam Traps