This toothbrush features a special bristle design called "Triple Rubber Bristles," which incorporates three rubber strands at the tip. The back end is equipped with twisted "Spiral Edge Bristles" made of hexagonal strands. With these two types of special bristles, it effectively smoothens the tooth surfaces. Additionally, the slim head and curved cut allow it to reach the back teeth easily. The compact head ensures thorough cleaning in every corner. ■ Bristle firmness: Regular ■ Model number: B-8058M ■ Bristle material: Black part: Saturated polyester resin, thermoplastic elastomer; Color part: Saturated polyester resin ■ Handle material: Main body: Saturated polyester resin; Rubber part: Thermoplastic elastomer ■ Heat resistance: 60 degrees ■ Made in Japan ■ Package size: 33×230×15mm, 20g