* Commercial & residential use, multi-size door closer, adjustable spring power.

* Universal application, designed for standard, top jamb, parallel arm installation.

* Closing and latching speed controlled by two separated regulating valves.

* Standard adjustable back-check & delay action function.

* Precision heavy duty rack(piston) & Pinion gear.

* Factory tested to meet or exceed ANSI standard 156.4

* Optional full/slim steel cover or PVC cover.