California's largest manufacturer of prefabricated Pittsburgh Corning glass block windows walls and showers , with over 18 years experience. Over 60 standard glass block shower designs available in CAD. We can also assist with design and specification of structural glass flooring systems. Pittsburgh Corning Glass Block Distributor, and proud Member of BlockPro, Glass Block Systems and National Network. Let us help you by making the incorporation of glass block in your next project a simple and pleasant experience.