Dental Orthodontic Rubber Bands Ortho Elastics Latex Braces Dental Orthodontic Elastics Rubber Bands Forces: 2.5oz (extra light) 3.5oz (light) 4.5oz (medium) 6.5oz (heavy) For ORMCO Zoo Pack Elastic Band (5000Pcs/Box) Yellow Elastic Bands Available force: 3.5OZ Available sizes: 1/8 3/16 1/4 5/16 3/8 For bag pack elastic band (5000Pcs/Pack) Yellow/Colorful Elastic Bands Avaliable force: 2.5OZ 3.5OZ 4.5OZ 6.5OZ Available sizes: 1/8″ 3.16mm 3/16″ 4.7mm 1/4″ 6.35mm 5/16″ 7.9mm 3/8” 9.5mm(only for yellow elastic band) Excellent for ortho patients Very good elastic bands and strong too FDA STATEMENT The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. If so, you can bid on this item only if you are an authorized purchaser. If the item is subject to FDA regulation, I will verify your status as an authorized purchaser of this item before shipping of the item. Folllowing are our detailed information, if any special request, you can contact us, we are the honest seller in China!