This is an interdental brush.

I am using an interdental brush, an oral care item.

I bought it at a pharmacy for 6,000 won.

I heard that buying and using a larger size widens the gaps between teeth, so I chose a thin one.

There are 10 pieces inside.

I was surprised by how much debris came out when I used an interdental brush after brushing my teeth with a toothbrush, so I have been using it consistently ever since.

I found that brushing alone couldn't remove foreign substances.

Oh, and it's nice that each one comes with a sanitary cap.

Be sure to try it.