Orthodontic Intra Oral Elastics Rubber Bands Latex Braces Force 5.0 Oz 5000pcs/Box. 5 sizes: 1/8"(3.18mm), 3/16"(4.76mm) , 1/4"(6.35mm), 5/16"(7.94mm), 3/8"(9.35mm). High-quality surgical latex. Consistent force pull.  Overview During orthodontic treatment, elastics are sometimes worn to pull the teeth and adjust the jaw position. Usually, the elastic is worn by the patient as advised by the doctor and is mainly hung between the orthopedic devices (brackets, traction hooks). Feature: High-quality surgical latex. Consistent force pull. Force ratings based on elastic being extended three times listed diameter. Specification: Strength: 5.0oz (140g) Size: Chipmunk 1/8" 3.18mm Rabbit 3/16" 4.76mm   Fox 1/4" 6.35mm   Penguin 5/16" 7.94mm   Monkey 3/8" 9.35mm Package: 100pcs/bag, 50bags/box, total 5000pcs/box