Thank you for viewing. HYDROPHIL Interdental Sticks 0.50mm Quantity: 6 sticks It seems that one stick can be used for about 14 days, so it should be enough for about 84 days. ☆Please purchase only if you understand that this item is stored at home by an individual☆ ☆Please only purchase if you agree to eco-friendly packaging (simple packaging) and recycled packaging☆ ☆Please refrain from purchasing if you are looking for perfection☆ ☆Please refrain from purchasing if you are sensitive to such things☆ Thank you. Thank you. Interdental brush 6 pieces 6 pieces 0.50 0.40