Materil: Nomex insulation paper(both sides) Polyester film ( in center) NMN(6640) Polyester Film & NOMEX Amide Fiber Paper Composites are a family of 3-ply laminates of NOMEX amide paper bonded to both sides of polyester film. Excellent heat resistances, dielectric property and mechanical strength; Good cutting and overload resistances, high stiffness; Good compatibility with insulation F varnish As slot, intertrun and liner insulations for F-grade motors and electric apliances Thickness: 0.18mm 0.20mm 0.25mm 0.30mm 0.35mm Width: 914mm color: White Form: In rolls Pacage: Carton and pallet Storage life---1 year