This is a single OEM ring designed for an air compressor. The purpose of this part is to distribute the pressure and heat equally by creating a firm seal between the cylinder and piston. It has an approximate inside diameter of 48 mm and outside diameter of 62.5 mm. This small metal ring is prone to deterioration and will need to be replaced from time to time. For this replacement, you will need a screwdriver, wrench set and pliers.
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Manufacturer Part Number: DAC-308