PLASTIC SPIN COLIMN usage for plasmid, DNA,RNA have many size to choose at very reasonable price contact for details PLASTIC SPIN COLIMNusage for plasmid, DNA,RNAhave many size to chooseat very reasonable pricecontact for detailswe are mould and plastic products maker, have all kinds of household, home appliance,labware,and telecom productshave about 10 years experiences,main on OEM and ODM, also ...