You can combine any of the sizes listed below. Please order in units of 50. If you don't see other sizes listed, please feel free to ask about stock availability. 50 pieces: ¥1270 100 pieces: ¥2390 The purchase price has increased compared to before. Therefore, we have had to raise the price. As the price is already set as low as possible, we cannot offer a discount. However, we will discount by about ¥150 if you purchase with toothbrushes, floss, etc. Thank you for your understanding. Product: L-shaped interdental brushes 4S: Passage diameter 0.6mm 3S: Passage diameter 0.7mm 2S: Passage diameter 0.8mm S: Passage diameter 1.0mm M: Passage diameter 1.2mm There are many in a package, so you can use them freely. I will respond carefully, so thank you for your cooperation.