Isolation mounts are used to attach and position systems, accommodate displacement, and isolate components from the surrounding structure (vibration, shock, noise). Mount Type: Two-Piece - Symmetric Head Outside Diameter (mm): 94.7 Head Outside Diameter (in): 3.73 Head Thickness (mm): 28.6 Head Thickness (in): 1.13 Pilot Outside Diameter (mm): 56.6 Pilot Outside Diameter (in): 2.23 Inside Diameter (mm): 19.4 Inside Diameter (in): 0.76 Mount Height (mm): 38.1 Mount Height (in): 1.5 Bonded Sleeve: Yes Standard Bolt Size: .75"