UNITOP compact cylinder with octogonal tube. Chromium-plated steel piston rod (male) with long piston. Non-Rotating. Type: RO420 Product number: RO420-040-0320 Material of piston seals: NBR. Material: piston- aluminium; Barrel- anodized aluminium. Bore diam. (mm): 40 Stroke length: 320mm Temperature (C): -20…80 Pressure (bar): 1,5 - 10