Cylinder blocks are an important component of air compressors, which provide air supply to different parts of the engine where needed Mount Type: Two-Piece - Non-Symmetric Head Outside Diameter (mm): 64.8 Head Outside Diameter (in): 2.55 Head Thickness (mm): 22.9 Head Thickness (in): 0.9 Pilot Outside Diameter (mm): 40 Pilot Outside Diameter (in): 1.57 Inside Diameter (mm): 17.5 Inside Diameter (in): 0.69 Mount Height (mm): 61.7 Mount Height (in): 2.43 Pad Height (mm): 22.9 Pad Height (in): 0.9 Bonded Sleeve: Yes Standard Bolt Size: M16