ZORO SELECT 1101BF x 689 GAV Manual Hydraulic GAV 1101 Standard Traffic Door Closer Heavy Duty

Adjustable Backcheck Valve, Adju Material Aluminum Color Gray Finish Aluminum Painted Includes Adjustable Back Check Valve, Clo Standards ANSI A156.4 Grade 1, UL; cUL Lis Series 1100 For use with Interior and Exterior Doors