Truth EntryGard Window Operator 31538A Left Hand Tan Excellent Dual Arm Truth EntryGard dual arm casement window operator features a robust metal construction with a tan/beige finish. This left-handed replacement hardware includes the gear mechanism and dual arms for smooth window operation. Marked with part number 31538A and patent numbers 4,241,541 and 350,432. The unit includes a plastic roller on the long arm and a link arm attachment point. Ideal for repairing or upgrading existing casement window systems. Measurements: • Total Length: 13.5" • Base Width: 5" • Base Height: 2" Please see all pictures for condiotion.