I love this bag, it is perfect for my Z-12. It is the perfect counter balance weight. I give 100 stars 5 is not enough. D.T.

Has just enough magnetic grip to stay without falling and doesn't have a ridiculous pull weight. Works great on a solid tube dob.

I have been using heavier 2in eyepieces and barlow so I needed to level out with a weight and these do the job and now I am not wieghed down but can stay up,I like them so much I might get more or be clever and make my own!

Many counterweights designed for Dobs have a tendency to damage the surface. This soft and flexable alternative is an excellent solution. The strong but soft exterior finish will not only prevent surface damage but allows for easy repostioning of the weights.

A terrific idea. When exchanging eyepieces on the scope, there is always the scope for imbalance, especially if you are swapping out one of those 2", 'hand grenade' kinds of eyepieces for a dainty little 1 1/4". Slide this bag (the magnets let it 'stick' to the OTA) around the tube to maintain the overall balance as you go through the changes. Simple, effective. Obviously need an OTA made of something ferrous - so, might not work on carbon fiber.