Single-Acting, General Purpose Enerpac RS-Series Hydraulic Cylinders are fitted with the exclusive Golden Ring design - a unique bearing design - which absorbs eccentric loads to protect the cylinder against abrasion, over-extension, and jamming for long, trouble-free operation. Cylinders are manufactured from durable high strength alloy steel, incorporate heavy-duty return springs and are finished in a baked enamel paint coat. CR-400 couplers and a dust cap is included on all Enerpac cylinder models, and cylinder life is extended through the use of plunger wipers, which reduces internal contamination. Enerpac cylinders are designed to be used in any position. Collar and plunger threads and base mounting holes (available on most models) enable the cylinders to be easily fixed in place. Replacement saddles are also available (for example: 283-0954 for 10 t Enerpac units).