a weak thing!

So for a dog (or what is meant) is the part completely useless! Maybe you can order a lapdog with about 3 - "cushion" Save Review 4 kg. My dog ​​is a Setter mix with approximately 20 kilograms - and the "stretch" this so-called "shock absorber" without any trouble to the max (I even watched her while yawning from boredom!).
I am sure that there must also be something indeed in a meaningful design. I've tried an 8m long towline with a highly stable steel spring and really works as a "shock absorber". I'll still keep the two bought "rubber bands", as they were indeed at least not expensive and I can tentatively use with my two cats.