https://amzn.to/470g5hZ 5-Count Oral-B iO Ultimate Clean Replacement Brush Heads (4 Ultimate Clean + 1 Gum & Sensitive) for $34.99 - 30% when you 'clip' the coupon on the product page - 5% when you check out via Subscribe & Save = $22.74. Shipping is free with Prime or on $35+ orders.