Double pane glass double sliding window, in a beige colored proprietary frame material used by Anderson, that they call Fibrex. You've probably seen the ads. Made with tempered glass. The protective plastic is still on the panes. Overall it measures 53-3/4" wide by 46-15/16" tall, and 4" thick. Opens left to right within the house, but once unlatched you can also slide open the right side. You'll need to have a screen made. Given who made it, there's no telling how much this window cost originally!