Whitening bristle brush replacements for the Apa Beauty White Sonic Toothbrush. The Whitening Bristle Brush is specially designed to help remove plaque and optimize cleaning for whiter teeth. When used with the White Sonic Toothbrush, its the ultimate experience in oral hygiene. - Contains 2 premium whitening bristle brush heads. . - Refills designed for the Apa Clean White Sonic Toothbrush.