SKU#: White: 4550182925845Blue: 4550182925852Gray: 4550182925869 MATERIALS: Handle: PolypropyleneBrush: Saturated Polyester Resin DIMENSIONS: Length 17.2cm / Approx. 6.8" HEAT TOLERANT: 70℃ COUNTRY•REGION OF ORIGIN China

https://www.muji.us/products/polypropylene-fine-bristle-toothbrush-oaea0a?_pos=2&_sid=e1e98afe3&_ss=r