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): 109 Head Outside Diameter (in): 4.29 Head Thickness (mm): 28.5 Head Thickness (in): 1.12 Pilot Outside Diameter (mm): 78 Pilot Outside Diameter (in): 3.07 Inside Diameter (mm): 26 Inside Diameter (in): 1.02 Mount Height (mm): 46.5 Mount Height (in): 1.83 Bonded Sleeve: Yes Standard Bolt Size: M20