A used piston and con rod for a early 70's York A/C compressor in good useable condition. One of the bolts needs replacing due to a damaged head. The piston is 47.6mm diameter, the rod has 12-5451 on it and the cap has 12-5453. I have the rest of it in bits as well, just ask if you need anything. I also have another whole one in good working order.