Clamp diaphragms are rubber partitions placed between the two halves of the air governor control. When air pressure is introduced into the air governor on one side of the diaphragm, the pressure flexes the diaphragm and exerts force on the pushplate attached to the push rod. The pushplate is held up against the diaphragm by a light duty return spring. Mount Type: Two-Piece - Non-Symmetric Head Outside Diameter (mm): 145 Head Outside Diameter (in): 5.71 Head Thickness (mm): 31.5 Head Thickness (in): 1.24 Pilot Outside Diameter (mm): 70.2 Pilot Outside Diameter (in): 2.76 Inside Diameter (mm): 26.8 Inside Diameter (in): 1.05 Mount Height (mm): 84 Mount Height (in): 3.31 Pad Height (mm): 25 Pad Height (in): 0.98 Bonded Sleeve: No Standard Bolt Size: M24