... :double-acting piston cylinder •rod:chrome-plated ,antirust,abrasion hardness •bore: no rust,smooth,neat •wiper seal 1.used for steering ... .D.50mm--100mm cylinder O.D.100MM--500MM. matel: steel. Bore Size -- 20mm ~ 200mm (0.5" ~ 10") Stroke-------- 100mm ~ 8000mm (2" ~ 310 ...