Air compressors provide air supply to different parts of the engine where needed Mount Type: Plateform - 2 Hole Mounting Overall Height or Sleeve Length (mm): 57.2 Overall Height or Sleeve Length (in): 2.25 Sleeve Inner Diameter or Thread (mm): 17.5, 17.4 Sleeve Inner Diameter or Thread (in): 0.69 Distance Between Flange Holes (mm): 108 Distance Between Flange Holes (in): 3.47