Adapters transform your personal vaporizer so you can explore the rest of the vaping world.
Please choose the correct adapter to what your looking to try out as followed.
A 510-801 adapter means: That your unit must have a 510 fitting on the top of the unit in order for you to use this item with an 801 Atomizer or 801 Fusion.
All adapters are cartomizer friendly.
Simple as turning a screw. If you are not making a proper connection from the adapter to the atomizer/cartomizer, you can safely apply a flat head screw driver to the 901 or 801 side of the 510/801 or 510/901 adapter and unwind.