"This is the second strongest Fitness-Mad Safety Resistance Trainer and is ideal for those familiar with resistance training. Supplied with 12 page A5 resistance training and usage guide covering 19 key resistance exercises for a total body workout. Also includes a door attachment that enables you to turn the Resistance Trainer in to a portable 'gym'. Our Studio Pro Safety Resistance Trainers offer a safe alternative to latex resistance tubes without compromising performance. The protection sleeve virtually removes the risks associated with latex tube failure and also extends the life of the latex tube. Product details: Resistance: Strong Length: Industry standard length tube of 120cm. Total length including handles 155cm Stretch: 4 times original length. 3x stretch = 8.5kg TPR handles for comfortable grip Colour: Red nylon protection sleeve Warning: Contains Latex tube inside the nylon protection sleeve"