Combining a scientifically-developed curved design with 0.6 mm ultra-fine water stream technology, this brush head reaches deep into crevices for a superior clean. It features high-resilience DuPont diamond bristles for effective plaque removal, while the 88.7% rounded tips and metal-free ultrasonic welding ensure a gentle, rust-free, and gum-friendly experience. Engineered with an arc-shaped triangular structure, it remains incredibly durable and fray-resistant even under pressure, providing a professional-grade, long-lasting solution for total oral care.