The only comb with Rid patented diamond-tine design. 100% effective for the removal of head and body lice eggs (as demonstrated in laboratory testing performed by trained testers). Double-sided design with stand-up base makes treatment user-friendly. America's leading lice brand for over 10 years. Need help? Call Rid: 1-800-Rid-Lice. Questions or comments? Call 1-800-Rid-Lice (1-800-743-5423) (Mon - Fri 9AM - 5PM EST). Made in China.