The Grille Kit can be used on wood, vinyl or aluminum windows and door lites. It can be used to accent your windows and doors or as replacements. The universal kit is simple to install and easy to remove for cleaning at a fraction of the typical cost. The kit contains enough material for a standard size window or door, and includes 12 pieces of 24" long attractive profiles, 8 of the "X" cross connectors, 16 fasteners and instructions. This product ships in approximately 3 days