PYLE PHLTB1BK 4 Replacement Electronic Toothbrush Brush Heads (Black Color) Type: Electric Brush Head Features: Fits models: PHLTB41BK and PHLTBS51BK Made specifically for Pyle Health Ultrasonic Electronic Toothbrushes Includes set of four multi-colored bristle tip replacements Dentists recommend changing brush heads every 3 months Removes significantly more plaque than a regular toothbrush Sold as: 1 set Weight: 0.08 lbs.