AZDENT Dental Orthodontic Colored Elastic Power Chain 15 Ft/Spool 10 Colors. Medical grade polyurethane ensures. Power Chain are easy-to-use continuous chains of modules for ligation, consolidation and anterior retraction. Superior color stability, fade resistant, high elasticity with superior memory and rebound. Manufactured using injection molding for optimum results. Do not require frequent change. Features a unique urethane formulation, Latex–Free.  Overview Power Chain are easy-to-use continuous chains of modules for ligation, consolidation and anterior retraction.  Superior color stability, fade resistant, high elasticity with superior memory and rebound. Manufactured using injection molding for optimum results.  Do not require frequent change, maintain color over time.  We control production every step of the way to deliver optimal elasticity and retention.  From the first piece of chain to the Continuous, gentle force for predictable tooth movement.   Features a unique urethane formulation, Latex–Free. Specifications Lengths:  Continuous/ Short/ Long Sizes: Long: 0.166" (4mm) spaceShort: 0.136" (3.5mm) spaceContinuous: 0.113" (2.9mm) space Thickness: 0.026" (Thin 0.018") Packaging: 15' per spool (4.572 m)