4pcs Toothbrush Heads ReplacementCompatible for X1 X3 X3U X5 Teeth Brush Replacement Heads(4pcs Black)

- 4-Piece Set: Meets daily replacement needs, eliminating frequent purchases and bringing convenience to life. - Wide Compatibility: Precisely fits X1, X3, X3U, X5 series toothbrushes. Simple installation for easy replacement. - Moderate Soft Bristles: Gentle to the touch, cleans tooth surfaces while reducing gum irritation, suitable for daily use. - Scientific Bristle Arrangement: Fits tooth contours, penetrates between teeth to help remove food residues and keep the mouth fresh. - Solid Craftsmanship: Stable structure with bristles that are not easy to fall off, providing long-term use guarantee.