Fits select 2-3/8" (60mm) Cylinder Bore model Oil-Free air compressors. Fix compressor runs so loud or does not pressure issue, make the compressor working like a new one. 1 x D25837 Coated Cylinder Sleeve; 1 x DAC-308 Coated Oil Free Piston Ring; 1 x SSF-3158-1 Piston Rod Cap Screw; 1 x SSG-8156 Valve Plate to Cylinder Sleeve O-Ring; 1 x ACG-45 Cylinder head to Valve Plate O-Ring; 1 x Service instructions for replacing connecting rod kit.