Black PTFE Sheet Film:34.25" L X 12.75" W, X .004" Thick or custom. PTFE Film is manufactured by suspend PTFE resin after molding. It has the best ability to anti chemistry corrosion, and non-aging, and can be used under -180C ~ +260C without load, and it has the lowest fiction coefficients in known solid materials. PTFE sheet film of advantages: Unaffected by almost all chemical;Continuous use at high temperatures;Slippery non-stick surface;Outstanding dielectric properties;Outstanding chemical resistance;Superb electrical insulating properties;A wide working temperature range from -180 °C + 260°C;A very low coefficient of friction, resulting in unique non-stick behaviour;High dielectric properties;Non-toxic;Virgin White PTFE film, plastic pure polymer film of properties