They turn your 14500 cells into D cells and it fits in blasters that require D cells.
This is a great spacer for 14500 batteries; only complaint is that regular aa batteries don't work and that six are twelve dollars. otherwise this is a good little spacer!
The review is it does everything it claims. You can put a AA into this spacer and now you can use it as a D cell. I got some rechargeable batteries that run a little bit more voltage witch makes the gun run faster. If you are reading a review on this item you are probably going to have no problem using this product. Get your self a couple get the C size as well they work as well as any spacers I have used.
Fantastic product and shop! Luke and his team are always the best! A++++++
Fast shipping, awesome products!! The aa to D's allow me to save weight and boost performance.
Works great in my Stampede, no issues at all!