Pilot Valve Diaphragm (1” square), to fit A-dec®; Pkg of 10 (A-dec® #22.0440.02) Used in coolant air & water valves, Auto Pac, air operated shutoff valves, black (water) & white (air) regulator valves. Package of 10 Kit Includes: stem, spring, diaphragm A-dec® is a registered trademark of A-dec, Inc. DCI has no affiliation with A-dec and A-dec has not authorized DCI replacement parts to be used on or in connection with A-dec® products.