C.R. LAURENCE FA2650 CRL 27" Window Channel Balance; 2650 or 26E 10, 20, 30, 40, and 50 Weight Range Balances in Lengths From 13&quot; to 43&quot; (330 to 1092 mm) Measures 5/8&quot; (16 mm) Depth, but Referred to as 1/2&quot; (13 mm) in the Trade