Check the listing for details. Window Security Bars Extendable Window Guard Grill Galvanized Steel vidaXL. Color: Silver, Condition: New. Listed at 121.99 USD. This security grille is manufactured to a high standard in order to increase the security of your house or office. Made of solid galvanized steel, this security grille with 4 crossbars is sturdy and durable, to effectively protect your property from burglary. With the decorative elements, the window grille also adds a touch of style to your house. This security grille can be installed horizontally with its adjustment in width from 39.4"-59.1" to fit a variety of windows. Our window grille is not only a high security option, but also a piece of fine workmanship. Assembly is easy. Delivery also includes mounting accessories. Material: Galvanized steel Height: 23.6" Width: Extendable from 39.4"-59.1" Crossbar thickness: 0.