Suitable for any kind of gym balls! Piston's length: 15 cm.
Fix with a not quick grab silicon glue. Remove any remaining part of the previous grip before fixing.
Spiral ring for stick
Cord for stick to be used in place of the spring catch. Tested for repeated and strong tractions.
Modular resistance band to strengthen specific muscles. It strengthens and loosens the muscles in a gentle way and without trauma.