EM-D-KAY PREMIUM SECURITY PRODUCTS 9000BCA, Aluminum, Grade 1 Commercial Hydraulic Door Closer Spring Power Adjustable From 2 to 6, Adjustable Triple Valve Back Check, ADA Compliant at lower setting. EM-D-KAY PREMIUM SECURITY PRODUCTS 9000 BC Series line of door closers meets ANSI Grade 1 A-156.4 standards, comes with a choice of adjustable closing speeds. These closers are specifically designed with the physically impaired in mind, and help meet ADA standards, while easing access for the disabled. The UL Listed 9000 series comes in a basic design: The 9000 BC is a heavy duty spring adjustable closer. Adjustable from 2 thru 6. The various models are all non handed for use on right or left hand doors. Needle bearings give smooth operation and long life. Two separate valves give adjustable closing and latching speeds. Rack and pinion mechanism. The cover is corrosion resistant. Each unit is packed with a parallel arm bracket. All models come with a full cover to hide screws and spindles. All with backcheck. Allen Key adjustment.