You are getting Arm & Hammer Spinbrush Pro Series White Electric Toothbrush Replacement Brush Heads Refills, Soft Bristles, 2 Count - 2 Pack. Includes: (2) 2-count packages of Arm & Hammer Spinbrush Pro Series White Battery Toothbrush Refills (Replacement Heads), Soft. Includes 4 replacement brush heads total. Includes replacement brush heads only. These refills for Arm & Hammer Spinbrush Pro Series Ultra White battery-powered toothbrush feature dual-action technology - simultaneous side-to-side spinning upper head and up and down motions on the secondary head—works with specialty whitening bristles to gently polish away surface stains as it cleans. Features: >>> WHITER TEETH IN JUST ONE WEEK. Get a brighter, whiter smile for a great price. >>> Patented dual-action technology, spinning and side-to-side. >>> DUAL-ACTION BRUSH HEAD for double the cleaning motion. Features patented dual-action technology for a combination of spinning and side-to-side brushing head movements. These replacement brush heads for the Arm & Hammer Spinbrush Pro Series White battery-powered toothbrush feature dual-action technology. Simultaneous side-to-side spinning upper head and up and down motions on the secondary head works with specialty whitening bristles to gently polish away surface stains as it cleans. >>> SOFT BRISTLES. Features soft bristles. >>> ADA (American Dental Association) accepted product. >>> Recommended by dentists. >>> CHANGE BRUSH EVERY 3 MONTHS. Change brush every 3 months or sooner as needed. >>> Instructions: Brush head is replaceable. To replace brush head: twist counterclockwise 90 degrees and pull away from handle. Slide on new head and turn clockwise 90 degrees until arrows are aligned. >>> Made by Arm & Hammer. UPC code: . >>> 30 DAY GUARANTEE. Go ahead and order now. There is zero risk for you. Your purchase is backed by Amazon.com's 30 Day Guarantee. "Items shipped from Amazon.com can be returned within 30 days of receipt of shipment in most cases.