Product Description The side edges catch and remove plaque. The twisted "Ultra Fine Spiral Edge Bristles" with hexagonal shape effectively entrap plaque due to their spiral edges. The head is approximately 28% thinner than our conventional products, featuring a slim design that makes it easier to maneuver in the mouth. The ultra-fine bristles penetrate periodontal pockets to scrape away plaque, while the flat bristles effectively remove plaque from tooth surfaces. The bristle hardness is soft. Model number B-8057S. Bristle material: saturated polyester resin. Main body material: saturated polyester resin; rubber part: thermoplastic elastomer. Heat resistance: 60°C. Made in Japan. Individual package size: 38×230×19mm, 22g. Caution (Disclaimer) > Please be sure to read [Delivery Service Providers] Yamato Transport Co., Ltd., Sagawa Express Co., Ltd., Japan Post. [Please be sure to read!] *For products that can be shipped by mail, standard mail, or letter pack, we will ship using each delivery method. Thank you for your understanding. (*Please note that we cannot specify the delivery service provider or delivery method.) *Occasionally, there may be box damage during delivery, and we