Key Specifications / Parameters Part Number: 2E859802202 Product Type: Actuator diaphragm Compatible Actuator Series: Fisher Type 667 Actuator Size Fitment: Size 60 Material: Nitrile elastomer (NBR) Diameter Approximate: 18 5/8 inches (~473 mm) Mounting Hole Count: 24 holes around the periphery (for Size 60) Application: Replacement part for industrial process control valve actuators where a properly functioning diaphragm is required for accurate valve actuation and response.