According to the quality, we use different kinds of material to produce the filament which used to make brush Diameter range0.05mm or above Cross-section Upon customer's request Density 1.06 g/cm3 Melting Point 212°C Package White crepe paper,PE tube,PE wrap,Spool Weight in each spool About 4kgs Strands in each spool About 100, 200 or 220 strandsQualified Tests FDA,RoHS,REACH,EEC,PAHs Nylon 612 ...