Features:
With 5 different resistance levels to meet your needs: Red(10Lbs), Yellow(20Lbs), Grey(25Lbs), Blue(30Lbs), Green(40Lbs).
Made of durable latex that is snap resistant and guaranteed to help you strengthen your body. 
Great for squats, lunges, side-to-side exercises, stretching, etc.
Lightweight and portable, can be used at home or gym.

Specifications:
Color: Red(10lb), yellow(20lb), grey(25lb), blue(30lb), green(40lb) (optional)
Material: Natural latex
Item size(C * W * T): 
Red: 500 * 50 * 0.4mm
Yellow: 500 * 50 * 0.7mm
Grey: 700 * 75 * 0.7mm
Blue: 500 * 50 * 0.9mm
Green: 500 * 50 * 1.2mm
Item weight: 9~27g / 0.33~0.95oz

Package List:
1 * Strength Resistance Band

Note:
The resistance strength was measured by machine at the state of 3 times prolonged.