... resin is suitable for making capillary tube,thin-wall tube,elastic belt and unsintered ta PTFE FINE POWDER DF-201 Excellent Grade ... & Cleaness White sheet surface,fiber is average,no gravel and metalic powder,even sheet texture ≤1 for mechanical impurity(≥0 ... barrels outside,on the barrel,there should be attached label and quality certificate,on which there are brand,trademark,executive criterion ...