Replacement Toothbrush HeadsCompatible for 507/508/551/515/917/959/2011FW-D1/D3/D7/D8(BLACK10 WHITE10 Care)

- Functions as Replacement Toothbrush Heads, specifically designed to be compatible for 507, 508, 551, 515, 917, 959, 2011 models and FW-D1, D3, D7, D8 models. - Features compatibility with 507, 508, 551 and 515 models, tailored to adapt to the replacement needs of these basic models for daily toothbrush use. - Aligns with the structural specifications of 917, 959 and 2011 models, ensuring seamless matching to maintain stable connection during the toothbrushes’ normal operation. - Matches the design requirements of FW-D1, D3, D7 and D8 models, maintaining stable compatibility to support proper integration with this FW series. - Meets practical application needs, combining replacement toothbrush head attribute and multi-model compatibility to fulfill daily brush head replacement demands.