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): 114.3 Head Outside Diameter (in): 4.5 Head Thickness (mm): 35 Head Thickness (in): 1.38 Pilot Outside Diameter (mm): 69.8 Pilot Outside Diameter (in): 2.75 Inside Diameter (mm): 27 Inside Diameter (in): 1.06 Mount Height (mm): 45.1 Mount Height (in): 1.78 Bonded Sleeve: No