Simplex R Series single-acting, spring return cylinders are an excellent choice for maintenance, positioning and production applications. They can also be used for a wide variety of pressing, bending, clamping, or tooling operations. Features include: High flow quality couplers with metal caps. Collar threads designed for full load. Base and piston mountings for easy fixturing. Removable load caps for flexibility and safety. Steel stop ring for piston blow-out protection. Plated piston to resist scoring and corrosion. Large bearings resist side load. Rod wiper protects inner cylinder from dirt. The suggested Hand Pump for all of these models is Type No. P42.