Cat parts are manufactured to precise specifications and are built for durability, reliability, productivity, less environmental impact, and reuse Mount Type: Two-Piece - Symmetric Head Outside Diameter (mm): 76 Head Outside Diameter (in): 2.99 Head Thickness (mm): 12 Head Thickness (in): 0.47 Pilot Outside Diameter (mm): 50.5 Pilot Outside Diameter (in): 1.99 Inside Diameter (mm): 27 Inside Diameter (in): 1.06 Mount Height (mm): 57 Mount Height (in): 2.24 Bonded Sleeve: Yes