I bought a large box of these Zoo brand Elastics but did not need as many so am selling it by the pack.

Product Name：

Orthodontic Latex Elastics(ZOO PACK ELASTICS)

Application:  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: 6.5oz(185g)

Size:

Penguin    5/16"   7.94mm