High Quality Material: The pump plunger, cylinder, spring, C-ring, and retainer are made of high quality material, ensuring outstanding wear and corrosion resistance. Two rubber sealing rings on the plunger enhance sealing performance for long-term use of the pump piston kit.

Replace a New Pump Plunger Kit: Over time, pump piston and plunger may wear and age from regular jack use, causing hydraulic oil leakage and reduced load-bearing capacity. Replacing it with a new pump piston plunger kit helps restore jack tightness, increase load capacity, extend service life, and enhance operating experience and safety.

Universal Compatibility: This piston kit fits all 3-ton hydraulic floor jacks with dual pumps, and is especially compatible with Torin Big-Red, for Harbor-Freight, for Daytona, for Pittsburgh, for Arcan hydraulic floor jacks. Replaces both the smaller and bigger piston on the lower side.

Low Side Smaller Size: Pump plunger measures 2.88" x 0.59" (with seals), and cylinder measures 2.64" x 1.06". Designed to replace the smaller of the two plungers at the low side. Capacity per stand: 3-1/2".

Low Side Bigger Size: Pump plunger measures 2.88" x 0.86" (with seals), and cylinder measures 2.59" x 1.19". Intended to replace the bigger of the two plungers at the low side. Package Contains: 2 Sets Jack Plunger Kit for Horizontal Double Pump.