We supply tempered and Pyroceram (also known as Neoceram) glass for fireplace and woodstove doors as well as other hightemperature glass applications. Tempered glass is heat treated to make it up to 5 times stronger than regular glass. Tempered glass has a thermal shock rating of 400 degrees F. It is commonly used in fireplace screens or other high tempereature scenarios. We sell a variety of clear, tinted, and textured tempered glass to suit a variety of needs. For woodstoves, gas stoves and cast iron stoves we carry Pyroceram glass. While Pyroceram is no stronger than regular glass as far as impact strenght is concerned, Pyroceram glass is a ceramic product that can withstand a thermo shock rating of 1380 degrees F.