HAXE Sonic toothbrush replacement heads in black color. The interchangeable HAXE Sonic heads are made from very soft DUPONT bristles. The fine fibers with a diameter of 0.152 mm reach difficult-to-access areas, while the rounded edges prevent irritation. The heads are compatible with the SG-B972DC and SG-W972DC toothbrush models. It is recommended to replace the heads every 3 months. The package contains 2 pieces.