Specification Item name: Resistance Bands

Material: Latex Size: Green: 600 * 50 * 0.35 mm tensile value 5 ~ 10lb         

Blue: 600 * 50 * 0.5 mm tension value 10 ~ 15lb         

Yellow: 600 * 50 * 0.7 mm tensile force value 15 ~ 20lb         

Red: 600 * 50 * 0.9 mm tensile value 20 ~ 30lb         

Black: 600 * 50 * 1.1 mm tensile value 30 ~ 40lb