Features: Made from environmentally friendly elastic silica gel,durable and stretch further. 5 exercise resistance band strengths-0.35mm (10lbs),0.5mm (15lbs),0.7mm (20lbs),0.9mm(30lbs) and 1.1mm (40lbs). You can combine the resistance bands together to give different resistance levels for your workouts. Suitable for yoga, Pilates, working out, stretching and work out etc. Specification: Material: Silica Gel Size: 600*50*0.35mm / 600*50*0.5mm / 600*50*0.7mm / 600*50*0.9mm / 600*50*1.1mm Package size: 170*60*25mm/6.7*2.4*1in Package weight: Approx. 150g/5.3oz Package List: 5 * Resistance Bands 1 * Carry Bag 1 * Instruction 1 * Box NOTE: Item color displayed in photos may be showing slightly different on your computer monitor since monitors. Thank for your understanding.