Specification for orthodontic chain power:<br />1. Power Chain are injection molded form optimum material 、 they tent to maitain theire elasticity & color over time and do not require to be frequently changed 、Long-lasting.<br />2. Package: In rolls、each spool contains 15 sheet of chain.<br />3. Color: Clear<br />4. Qty: one roll<br />5.length:2.86m