china membrane filter Our factory introduce foreign advanced technology,according to FDA and GMP standard manufacture,filter apparatus quality for import ... stability of the speed and chemical stability is good.Filter can stain except that most particle,apply precise stain ... polytetrafluoroethylene(PTFE),polysulfone,nylon,polypropylene,acetic acid fibre 4.Filter hole have0.1UM,0.22UM,0.45UM,1UM,3UM ...