To replace all of them you will need to order a quantity of 3.

Must order quantity of 4 for complete set. 

Compression nut and sleeve for 3/8" OD tubes.

Old Part Numbers: Z-AC-0032, AC-0032Valve plate comes with preinstalled valves and o-rings. Poor performance or air leaks out of the intake filter while the unit is running? This is probably the problem.

Old Part Numbers: K0058, K-0058, K0650, K-0650 Sears 919.16014, 91604, K-0650Compression ring replacement kit includes the cylinder, piston ring, retaining screw, o-ring, and head o-ring. Restores compression. Note: Does not include connecting rod/piston...