ABUS Expandable Window GrilleThese window grilles from Abus are designed to fit in the outside recess of windows, and they are ideal as a security feature for vulnerable windows, such as ground floor and cellar windows. Made from thick passivated steel, they are corrosion resistant and supplied with all required security fixings. With various heights available, each unit is also telescopic, making them expandable by width. Adjustable width Fixed height various sizes available