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Buy 2, get 1 free! . Introducing 3-pack of our interdental brushes.. Our Interdental brush is designed for small interdental gaps to help remove plaque and tartar build up that a Toothbrush or Floss can't reach. The handle is made from sustainable FSC Beechwood, suitable for home compost. Every tree cut down is re-planted and excess material is used to heat up the factory. These BPA-free nylon bristles effectively access gaps in your teeth without damaging the gums.. Comes in as a pack of 6. 0.4mm bristle for very narrow interdental gaps. 0.5mm bristle for narrow interdental gaps. 0.6mm bristle for interdental gaps. Sustainable interdental brushes - Eco-friendly interdental brushes - Made in Switzerland