"100% Brand New Materials:Top quality natural Rubber Latex Size:500mm Circumference; 50mm Width Package Included:1*Resistance Band Color: Blue/Red/Black/Green(Different colors, different thickness and strength specifications) Feature: Firm and Durable Comfortable in touch and wear Perfect for lower body excercises including forward, lateral, and backward movements Good for ankles, calves, knees, thighs or wrists The resistance strength was measured by macine at the state of 3 times prolonged. Attention: Due to different measurements, please accept 1-3cm error; please allow reasonable color difference as different computer screen may display different colors NOTE: By default, this item will be shipped through China Post Original Small Packet Plus,which is without an international tracking number and can only be tracked within China. If you need an international tracking number, please choose China Post Registered Air Mail as shipping method.