Extruded aluminum astm6005 body with bath internal and external corrosion protection having honed cylinder surface for longer life and low coefficient of friction. Dual piston rack and pinion design for compact construction, symmetric mounting position, high-cycle fife and fast operation, reverse rotation can be accomplished in the field by simply inverting the pistons. Multiple bearings and guides on racks and pistons, low friction, high cycle life and prevent shaft blowout. Modular preloaded spring cartridge design, with coatedspring for simple versatile range, greater safely and corrosion resistance, longer cycle life. Fully machined teeth on piston and pinion for accurate low backlash rack and pinion engagement, maximum efficlency. Stalnless steel fasteners for long term corroslon resistance Full conformance to the latest specifications: is05211, din 3337 and namur or product inter changeahility and easy mounting of solenoids, limit switches and other aocessodes.