Isolation mounts are used to attach and position systems, accommodate displacement, and isolate components from the surrounding structure (vibration, shock, noise.) Overall Length (mm): 28.6 Overall Length (in): 1.12 Head Outside Diameter (mm): 66.9 Head Outside Diameter (in): 2.64 Pilot Outside Diameter (mm): 35.1 Pilot Outside Diameter (in): 1.38 Inside Diameter (mm): 13.2 Inside Diameter (in): 0.52