Fitness-Mad's Resistance Tubes are made from a multi-stranded rubber core with a protective nylon covering, which prevents the possibility of a sudden tube failure, that can occur with latex tubing. The rubber offers natural and progressive resistance and avoids the possibility of latex allergies. Available in 3 strengths with comfortable integral foam-covered handles. The resistance level is marked on the handles to make identification easier when used in a class or studio environment. Please note that this version is packed in a PE bag only and does not include a user guide. Product details: Dimensions - 130cm length Material - Multi-stranded rubber core, foam handles Max product stretch - 3 times original length Strengths - Light (Light Blue) / Medium (Pink) / Strong (Dark Blue)