... Songhua which has engaged in PTFE business for more than 20years,with good credit. it is managed by standard of ... quality, considerate service, competitive price. 1,Appearance request: It is homogeneous in structure, smooth surface, no defects of air bulbs, crevices ... by methods of moulding. 3.Specifications:Ptfe special articles is homogeneous in structure, smooth surface, no defects of air bulbs, ...