The Parogencyl interdental brush starter kit includes one durable handle and two interchangeable flexible brush heads. Its soft bristles allow for gentle and precise cleaning of hard-to-reach areas. Who is it for? Perfect for people with gum problems or who wear braces. Instructions for use 1. Insert the printhead until you hear a click. 2. Use until the bristles fade. 3. Keep the handle and replace the head. 4. Keep out of reach of children. Pharmaceutical recommendation Replace the brush head with a new one every 3 months or when the color of the bristles fades.