For long-lasting comfort and enjoyment, this JELD-WEN V-2500 Horizontal Sliding Vinyl Window, 48 in. x 48 in., White, with LowE Glass and Screen is an ideal choice for your home. The window's Energy Star rating means cooler summers and warmer winters and the vinyl construction means that it is easy to maintain. The whitewash finish complements many styles of homes. It has a locking mechanism for safety and peace of mind.