• Universal compatibility for almost all Oral-B oscillating electric toothbrushes such as Pro, Smart, Vitality, and Genius. • Not compatible with Oral-B iO and Pulsonic models. • Ergonomic brush head made of FSC-certified bamboo and 99% plastic-free. • Plant-based nylon bristles derived from castor oil for gentle dental care. • Optimized mechanics with revised internal technology for stable, quiet, and long-lasting cleaning. • Each of the 4 heads includes a symbol engraved on the bottom to distinguish use between multiple people. • Natural finish with a soft carnauba wax coating to protect the wood. • Sustainable packaging in a plastic-free cardboard box.