Radius Source Toothbrush with Replacement Head - Medium - Case of 6Flax Reverse Handle for Left Hand Handle Made of Bio Plastic Replacement Head Toothbrush Made in USA The Natural Choice for a Natural Smile Design for Durability 93% of waste eliminated by replacing only the surgical grade nylon head Non slip customized right or left hand grip Premium Radius Hex bristles with a radiating design help accurate and effective brushing The tools you choose are the key to a healthy mouth. Pamper your teeth with a Radius.