Electric/Pneumatic Valve Spring Kit; MROSCS Leaf Class Name Valve Spring Kit; Used On Item Valve; Used On Model/Brand V-3011/V-3020/V-3752/V-3755/V-4510/V-5250 (Valve), V-3000-1/V-3000-2 (Actuator); Size 5/16 Inch; Pressure Rating 3 to 6 PSIG; Kit Includes Spring, Upper and Lower Spring Seat, Stem Extension, Stem Lock Screw and Instruction