Assembled double-acting pistons made of C45 (F114) steel, guided by the KGD piston seal to keep the lapped tube free from wear or seizure, in which we can exchange the type of piston seal for its analog DPS (Polypac). All our gaskets are from the renowned manufacturer of hydraulic gaskets Aston seals, a manufacturer with more than 60 years of experience. Wide range in diameters and for different applications.