Gem Bids For 34 Fisher Actuator 656 Size 60 Yoke Type Direct Acting Spring And Diaphragm Rotary Actuator As Per Spec Spare Diaphargm For Above Mentioned Actuator Model No: 656 Size: 60 As Per Specification Attached. Spare Diapharam For Above Actuator Type: 657 - Size: 40 As Per The Specification Attached Spare Diaphargm For Above Mentioned Actuator Model No: 656; Size: 40 As Per The Specificaiton Attached