Pneumatic Valve Actuator, Air Connection Size 1/4 in, Air Connection Type Barbed Hose, Application Control of Hot/Chilled Water, Compatible Valve Size 2 1/2 in, 3 in, Compatible Valve Stem L, Compatible Valve Type Globe, Control Pressure – Maximum 25 psi, Diaphragm Material EPDM, Effective Diaphragm Area 25 sq in, Housing Material Carbon Steel, Includes Insert Insert Not Included, Includes Mounting Kit Valve Mounting Kit Included, Includes Positioner Positioner Not Included