PBT Two-ends Double Tapered Toothbrush Bristle Filament
PBT Two-Ends DoubleTapered Toothbrush Filament Bristle -Toothbrush Filament Bristle Product Description: PBT Tapered Toothbrush filament are made of PBT (polybutylene terephthalate)filaments chemically treated to produce the unique tapered
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