.86 for OBS Cheetah 3 RDA, Dual Coil Builds, Squonker Compatible Here comes the third generation of OBS Cheetah range, which inherits the good built quality of its predecessors, but also adds some improvements. The OBS Cheetah 3 RDA is 25mm in diameter, making it fit nicely on most mods. It comes with a dual coil build Published 5 Years Ago by alina123