The "Blue and Improved" Original Line® non-rotating cylinder features permanent grease lubrication. Design enhancements have more than double the anticipated service life of this cylinder, featuring a square piston rod to prevent rotation.  The unique geometry of the piston rod and end cap features a square profile with rounded corners, providing superior rotational control.Bore sizes:  9/16”, 3/4", 1-1/16”, 1-1/2”, 2”, 2-1/2"Stainless steel piston rod is standardUrethane rod sealRotational control of ± 3°Blue and Improved design doubles previous cylinder lifePermanent grease lubricant requires no additional lubrication during serviceEngineering SpecificationsPressure Rating: 250 PSITemperature Range:Buna N seals: -20° F (29° C) to 200° F (90° C)Fluoroelastomer seals for high temperatures (up to 400°F) availableMagnetic piston option: max. operating temp. is 185° FMaterials:Rod: Stainless steel piston rod standardBody: 304 stainless steelEnd Caps: 6061 aluminum (RoHS compliant)