Model Number 840#1 Selling Floss Threader Threads floss under: Braces Bridges Implants CrownFlexible Eez-Thru loops for safe and comfortable use #1 Dental Recommended ThreaderConsult your dental professional, your best authority on proper use. Use about 18in of BUTLER G-U-M? Dental Floss. Pull 4-5 inches of floss thru loop of threader. Pass floss threader thru space between teeth or under appliance. Complete your flossing procedure as recommended by your dental professional.3-Step? System To Healthier Gums: Step 1 - Brush. Brushing alone is not enough because it only removes up to 50% of plaque. Step 2 - Floss. Brushing and flossing only remove up to 70% of plaque. Step 3 - Custom Care. For optimal gum health...brush, floss, schedule regular dental visits and consult your dental professional to customize your oral care routine. Call 1-888-777-3101 or visit jbutler.com