This fits your .

When doing pull-up or chin-up exercises, you need to pull your entire body weight up. And that requires a tremendous effort. You can make it a little easier with this Tunturi Pull-up Assistant. The straps can be set to three different resistance levels. If you use all three red tubes, then the resistance is big and the exercise is the least intense. The exercise is intensified by removing the tubes, which reduces the resistance. You can attach the straps to several fixed points, for example a loose pull-up bar, the pull-up bar of a strength station or even a tree branch.

TUNTURI Pull-up Assistant - BYWJ6YQ8I