This high quality Porsche 911 rear window is made from 1/8" thick Poly-carbonate and is a replica of the original stock 911 window. The window is heat formed to duplicate the correct curvature of the stock type Porsche 911 window and comes complete with a mar resistant and anti-fog coating. It is designed to fit in the original rubber gasket on all 911 and 964 models or GT Racing "Flush Frame" (GT Racing Part #51). Approx weight 6 lbs (orig. glass 21 lbs).