* All cylinder pistons are chrome plated, hardened alloy steel with the exception of model # 21-0102-00 which has a piston made of unhardened stainless steel.
** Cylinder capacities are listed at 5,000 psi maximum operating pressure. The output force is adjustable by varying the hydraulic system pressure. To determine approximate output force for your application, multiply the piston area by the operating pressure. (Actual force my vary slightly due to friction loss, seal and wiper drag, and/or return springs.)
Special tough wipers help keep chips and contaminants out on all cylinder sizes.
Positive piston stop shoulder keeps the spring from "bottoming out", guarding against premature spring failure which can plague other cylinder brands.
BHC™ (Black Hard Coating) on the cylinder bodies helps prevent scoring and scratching. After years of use, cylinder removal is easier because of BHC's corrosion resistance.
Cartridge models use a gasket to seal against the cavity bottom.