... soft,so that it will not hurt the tube. Diameter0.10mm or aboveCross-section Upon customer' ... paper,PE tube,PE wrap,Spool Qualified Tests FDA,RoHS,REACH,EN71,EEC,PAHsThe transpatent nylon 66 filament ... can be made into the tube brush. Its is flexible ... and soft,so that it will not hurt the tube. Making tube brush for Nylon 66 ...