Aluminum die cast body with steel arm to resist corrosion. Heat treated steel rack and pinion for smooth action and minimum wear. Stable hydraulic fluid for multi-climate operation and constant lubrication. Adjustable back check. Fits left handed or righ handed installations. Does not have hold-open feature. Sizes 1-4. ADA compliant. Boxed. • 50in. Maximum Door Width • Max Dr Wt Lbs=240 • Finish=Silver