Nylon 66 filament is a material with heat-resistant, good low temperature ... tube,PE wrap,SpoolQualified TestsFDA,RoHS,REACH,EN71,EEC,PAHsNylon 66 filament is the heat-resistant, good low temperature performance product ... able to bear chemicals and oil.Usually it’s used for comb,toothbrush, cleaning brush and industrial use, etc. Nylon 66 for making hair brush