The CRL Vertical Sliding Ticket Window can be installed above the countertop without altering its surface. It is fabricated of heavy gauge extruded aluminum in satin anodized or bronze anodized finishes. The sliding lower panel is glazed with 1/4" (6 mm) clear glass, and has spring-tensioned guides to hold it in the raised position. Two spring-loaded knob latches will secure the window in the closed position. Pile weather stripping along the lower frame prevents drafts. Frame protrudes only 1" (25 mm) on clerk's side, and glass channel installs easily in 1/4" (6 mm) thick glass. Template included. Glass cut-out information and installation guide are available. Custom sized channels to install on thicker glazed units are also available on special order.