50 Ton Hydraulic Cylinder Jack 4 in Stroke Solid Ram Single Acting Plunger 635cc. Hydraulic Cylinder Jack Single Acting. This is a new 50 Ton Hydraulic Cylinder Jack. Lightweight Design for Small Workspace. Chromium Plated Surface of Piston, Prolonging the Service Life of Piston. Plunger Has the Function to Retracting Automatically. The joint of this product is a ZG-3/8 19 tooth British taper thread. Feedback is very important to us. It is impossible to address issues if we do not know about them! Faction is our ultimate goal. We work hard to earn your trust and future business. A If you receive a defective item, you may return it or ask for a discount. Due to time zones, our reply to your questions may not be immediately. If it’s non-workdays, please kindly be patient and wait till Monday.