Dental floss with an L-shaped brush that easily cleans the gaps between molars. - Quantity: 10 pieces - Shape: L-shaped - Brush tip: Soft - Target age: 10 years and older - Size: 1 (sss) I believe this is the thinnest type. I bought it and never used it. I'm selling it because I don't use it. *Due to hygiene reasons, returns are not accepted. (Even if unopened, returns are not accepted) *Please refrain from purchasing if you are concerned about storage at home. Thank you for viewing.