16/20Pcs Toothbrushes Head Compatible for Y1S/Y4/U1/U2/U3/P1/P4(20pcs)

- Toothbrush heads compatible with Y1S, Y4, U1, U2, U3, P1 and P4, available in 16 and 20-piece packs - Dual pack options cater to different short and long-term replacement requirements - Precise fit ensures secure attachment to the handle, preventing loosening during daily use - Tool-free installation allows quick and hassle-free replacement whenever needed - Compact and portable design enables easy storage and convenient carrying for home and travel