Hager 5300 Series Aluminum Grade 1 Heavy Duty Surface Door Closer, Multi-Mount, 1&ndash;6 Adjustable Spring Size, Sprayed Aluminum Finish Standard Tri-Pack of Parallel, Regular, and Top Jamb Arm Offered for Versatility Tempered Springs made of Double Heat Treated Steel for Durability Adjustment Valves are Staked to Prevent Accidental Removal Full Rack and Pinion Operation, UL/cUL Listed for up to 3 hours BHMA Certified ANSI A156.4, Adjustable Sizes 2 to 6 - Standard