【Stackable up to 150 lbs】For maximum longevity and safety during use, the 48" Sport Bands are made of high-grade natural latex with sturdy metal climbing clips that won't break or deform. These 5-piece stackable bands come in different resistance levels: yellow (10 lbs.), blue (20 lbs.), green (30 lbs.), black (40 lbs.), and red (50 lbs.). They can be used…