... nylon toothbrush filament pa610/pa612 Solid round level filament Cylindrical Good wet stiffness Excellent bend ... /PA612 toothbrush Filaments 1.Product Description:-Solid round level filamentCylindrical2.Technology :-Good wet stiffnessExcellent bend recovery3.Specification ... ,- Anti-microbial filament, Nano anti-microbial filament,- Time indicator filament,- Super fine filament in spool, bobbin, Super ...