Impact resistant solid vinyl frame and sash, fully welded. Double strength tempered glass for added safety and durability. Both sash operate and are removable. Fully weeped frame for efficient water removal. Pre-punched nailing fin for added ease of installation. 1" J-channel siding return. Fully weather-stripped. True interlocking sash. Hook latch lock for positive sash to sash engagement. Includes full screen.