Radius toothbrush, replacement head 2-pack, medium are made with 100% vegetable bristles and are bpa-free. The replaceable bristles last up to nine months, which means they're being used longer and not adding to landfills while still providing excellent cleansing. These replacement heads are available in super-soft, soft and medium styles. This product has not been tested on animals and is accepted by the american dental association. Each package contains 2 heads.