Clear – Dental/Orthodontic Elastic Bands. — You will receive 1 Pack (100 Elastics per pack) —- Size: 5/16" Medium / Heavy 4.5 oz. —- Factory Doubled Sealed Packs.—- Manufactured from prime medical grade material, these elastics are the highest quality elastic on the market. Every package is checked to assure all cuts are consistent and that the forces are correct. —– Other uses for orthodontic elastics: dog grooming elastics, doll hair elastics, cornrow rubber bands, fishing rod building guides blanks, small rubber bands for crafts, model airplane rubber bands, small elastics for packaging purposes.