Features: 1. Power Chain are injection molded form optimum material they tent to maitain their elasticity & color over time and do not require to be frequently changed ,Long-lasting. 2. Package: In rolls,each spool contains 15 feet(4.57m) of chain. 3. Color: 36Colors to choose 4. Size: Continuous / Short / Long 5.Color: 1#--Clear ,2#--Silver,3#--White,4#--Red, 5#--Pink,6#--Golden,7#--Orange,8#--Grey 9#-Black,10#-Green,11#-Yellow,12#-Purple,13#-Blue,14#-Green,15#-Sky Blue 16#-Indigo,17#-Cyan,18#-Transparent Red,19#-Light Purple,20#-Light Pink,21#-Nacarat 22#-Peach Red,23#-Steel Blue,24#-Light Blue,25#-Metal Light Blue,26#-Dark Blue 27-Light Yellow, 28#-Light Purple,29#-Burgundy,30#-Red Orange 31#-Transparent Purple,32#-Metal Purple, 33#-Metal Dark Purple 34#-Metal Light Green, 35#-Metal Green,36#-Transparent Blue Package Including: 1 Roll Feature: Orthodontic ligature chain, orthodontic appliances special materials. Excellent stretch and rebound. Giving superior elongation for easy application. Rotate, Ligate, maintain or consolidate spaces easily and quickly. Unique Heat-curing process enables chain to last longer than others. Elasticity Remains active to one month, assuring faster tooth movemen