PERFECT COMPATIBILITY: Designed to perfectly fit the GuruNanda Steel Sonic Toothbrush. These replacement brush heads utilize sonic vibrations to deliver deeper cleaning & enhanced plaque removal. DUPONT SOFT BRISTLES: Featuring soft, dense & rounded DuPont bristles.  These brush heads are ideal for individuals with sensitive teeth & gums. They provide gentle yet effective plaque removal for a thorough cleaning. EASY REPLACEMENT: Replacing brush heads on the GuruNanda Steel Sonic Toothbrush is quick & easy. Just pull the old head to remove it & push to securely attach the new one for a quick, hassle-free replacement. DURABLE: These brush heads are highly durable. Replace your brush head every three months for optimal hygiene & a healthy brushing experience. PREMIUM QUALITY ASSURANCE: GuruNanda is committed to authenticity and good karma. Our BPA, & latex-free brush heads undergo strict testing for durability to ensure top-tier performance for your oral care routine.