Designer Deplhi pattern offers maximum privacy with maximum light transmission. Pittsburgh Corning's GuardWise windows are made from the highest quality American Made glass block. Eliminates the need for storm windows, reduce heating and air-conditioning costs. No painting or caulking required with nothing to peel, rot or rust. These windows use natural light to produce beautiful and dramatic effects in your home. Enhance your home with an efficient sound barrier, safe and secure glass block window.