REDI2SET Diamond Glass 40-1/4-in x 17-1/4-in Frameless Replacement Glass Block Window

Diamond Glass 40-1/4-in x 17-1/4-in Frameless Replacement Glass Block Window. REDI2SET glass block windows are the ideal basement replacement window; they also make great windows for bathrooms, garages, kitchens and entryways. Made of 100% real glass, REDI2SET glass block windows are fully assembled for easy installation. Thick break-resistant glass enhances home security. Prismatic diamond glass pattern diffuses light and provides maximum privacy. Provides improved energy efficiency over old single-pane basement windows. Efficient sound barrier reduces noise from outside and helps keep homes quiet. Assembled in the USA by 1 of America's oldest glass block companies. Non-vented option features clean, all-glass look. Rough openings should be 0.5-in to 2-in larger than the actual window size