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 - Non-Symmetric Head Outside Diameter (mm): 87.8 Head Outside Diameter (in): 3.46 Head Thickness (mm): 25.4 Head Thickness (in): 1 Pilot Outside Diameter (mm): 58.4 Pilot Outside Diameter (in): 2.3 Inside Diameter (mm): 21 Inside Diameter (in): 0.83 Mount Height (mm): 73 Mount Height (in): 2.88 Pad Height (mm): 25.4 Pad Height (in): 1 Bonded Sleeve: Yes Standard Bolt Size: M20