PEI sheets are made of high-performance plastic that’s extremely resistant to heat and flame. PEI (Polyetherimide) material is perfect for 3D printing applications. Because of the compound’s rigidity and stability, these clear plastic sheets can be used for machined components in the medical and pharmaceutical fields. A clear polycarbonate sheet can be used to make shatterproof windows and lightweight eyeglass lenses. We also carry ULTEM® PEI products that have exceptional mechanical, thermal, and electrical properties. Zoro also has a great selection of UHMW polyethylene sheets, PEI rods, PTFE sheets, and PTFE rods.