Four M Technologies [P] Limited offers Single Acting Cartridge Pull Cylinders. Four M Technologies [P] Limited also manufactures various types of hydraulic cylinders and hydraulic modular fixturing systems. The Single Acting Cartridge Pull Cylinders are installed behind fixture plates whereÿit can apply clamping force without taking up valuable fixture space. The Single Acting Cartridge Pull Cylinders retract when hydraulically pressurized and has extension through manual or spring. These Cartridge Pull Cylinders have corrosion resistant cylinder body.