Polytetrafluoroethylene (PTFE) has excellent chemical resistance. It is opaque, white and has the lowest coefficient of friction of any solid. Useful temperature range is -180 C to 260 C. Virtually inert but not recommended for use with fluorine, gaseous or molten alkalai metals. Density: 2.20
100% Satisfaction Guarantee: At Mansion Schools, we want to be sure that the item you choose is the right one for you. Within 30 days of delivery of your order, you may return any merchandise purchased from Mansion Schools in its original condition with your email order confirmation or packing slip. Restocking fees may apply. On items over $275 shipping within the US, we will even arrange free pick up or pay for returns shipping.