Product Description 1. "Super Slim" interdental brush that can be inserted into tight spaces (allows passage diameter of 0.6mm). 2. Comes with a reliable "size exchange service." 3. Convenient packaging for storage and keeping. Ingredients and Materials [Materials] Handle - Polyethylene Bristles - Nylon Wire - Stainless Steel Cap - Polypropylene How to Use *Please do not force insertion. (1) Gently brush back and forth horizontally in the interdental area a few times. (2) When bending the interdental brush, please bend it slowly. Bending the wire may cause it to break. (3) When extending with the cap, make sure to insert it securely all the way in. Safety Warnings - If the interdental space is narrow and difficult to insert, do not force it in. This may cause injury to the gums or lead to breakage and swallowing. Do not bend or twist the wire. - After use, wash thoroughly under running water, shake off excess water, and store in a well-ventilated area. - This product is intended for cleaning interdental spaces; do not use it for any other purpose. *Initially,