Fitness Mad Safety Resistance Trainer (medium) 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. Includes resistance training and usage guide with 19 key resistance exercises. Also includes a door attachment that enables you to turn the Resistance Trainer into a virtual gym. Maximum tube stretch: 4 x original length. The protection sleeve virtually removes the risks associated with latex tube failure and also extends the life of the latex tube. Specifications: Dimensions: H:20.8 x W:7.7 x D:16.7 cm Model Number: KFA244