Isolation mounts are used to attach and position systems, accommodate displacement, and isolate components from the surrounding structure (vibration, shock, noise.) Overall Length (mm): 84.0 Overall Length (in): 3.31 Head Outside Diameter (mm): 144.1 Head Outside Diameter (in): 5.67 Pilot Outside Diameter (mm): 70.0 Pilot Outside Diameter (in): 2.76 Inside Diameter (mm): 48.0 Inside Diameter (in): 1.89