4" bore x 30" stroke log splitter hydraulic cylinder 3500 PSI. Heavy-duty hydraulics, 2-year hassle-free warranty. Magister cylinders manufactured using steel piston and steel gland with wear rings for long life. Welded steel clevis end and pin through hole on the rod end, honed cold-drawn tubing, hard chrome plated rod and top quality piston seals allow Magister Hydraulics cylinders to work in extreme winter conditions. Great replacement for use in different types of log splitting equipment such as gas log splitters, electric log splitters, 3 point tractor log splitters and skid steer log splitters.