The Norton 1601-689 Aluminum Storefront Door Closer, Tri-Style® packaging, regular arm, top jamb, and parallel arm mounting All standard arm applications allow doors to swing 180°, Multi-Size 3 thru 6, in an Aluminum Finish. Separate and independent, latch, sweep and backcheck intensity valves, conditions permitting Staked valves, cast aluminum. 1601 Closers are highly corrosion resistant. ANSI/BHMA A156.4, Grade 1. See Spec Tab For Additional Product Info.