Satin Anodized Rotating Service Window * For Drive-Thru or Walk-Up Service Windows * Built in Speak-Thru Included * Available in Two Finishes. Used to serve packaged goods from an enclosed area. Excellent for drive-up or walk-up service windows. Satin anodized or duranodic bronze aluminum frame contains a fixed 1/4 inch (6 millimeter) clear tempered glass panel and a No. 834 Speak-Thru in the upper portion. Lower portion contains rotating drum that will provide pass-through security. Built in latch prevents unwanted drum rotation. The entire unit fits a rough opening measuring 36-1/4 inches high x 16-1/8 inches wide (921 x 410 millimeters). Framed rotating drum by itself is available on special order.