... and surface hardness. Suitable to wind film, metal foil High-grade Seamless Paper Cores:Polymer coated.Hi-temperature solidified.Precise mould ... extruded.No gap or wrinkle on surface.High clean, roundness, lineal measureand surface hardness.Suitable to ... ,coating,metal capping and inner printing available for options. Quality:Leading world wide.For Inquiry,pls advise ID, Wall ...