Pump Piston Replacement Kit Fit Harbor Freight, Costco 3 & 3 1/4 ton Floor Jack Features: Fitment: This Pump Piston Replacement Kit is compatible with 3 & 3 1/4 t. Jack. Fit for the following brand: ARCAN HJ3000, COSTCO, HARBOR FREIGHT, POWERBUILT, NORCO, CORNWELL, ASTRO, MATCO, AFF, JACKCO, SUNEX, NEIKO, NEIKO PRO. Replacement: It is a perfect pump plunger replacement kit — “LOW SIDE” —(“smaller of the two plungers”). If you are looking at the floor jack from the rear (casters) the plunger listed here stays to the left. Note: The plunger diameter is smaller than the one to the right of it. .
