These dental floss threaders are made of nylon and designed to fit easily under braces, bridges, and implants. Regular use helps prevent gum disease. The loop fits any type of floss and the flexible tip makes it easy to reach small spaces. Use with your favorite dental floss for optimal oral hygiene. Pack of 35 in random colors.Features Designed to fit between braces, bridges and crowns. Regular use of dental floss will help prevent gum disease. The Floss Threader is designed to assist you in threading dental floss under bridges, orthodontic appliances, implants, and between connected crowns. The simple loop fits any type of floss and the flexible tip makes it easy to get into small or awkward spaces Use with your dental floss for flossing under bridges and braces.Specifications Material NylonPackage included 35 x Dental Floss Threaders (Color Random)Notes 1. Manual measuring, please allow 1 ~ 3mm error,thank you.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the picture.