The Series 70 horizontal rolling windows are single glazed, ideal for pole building, garages, and lawn buildings. Self-trimming frame ready for any type of siding. Self-draining head, needs no additional drip cap. Passes all forced entry resistance tests and specifications. Moving window cannot be lifted out from the exterior or interior except in wide open position, this feature is built-in for further security, no screw adjustment required. Suggested Rough Opening