Thick little 4 gauge threader hoops made of work-hardened, lightweight aluminium. They close with a copper wire spring in one of 4 colours: jet black, rose-gold, gunmetal, or raw brass gold. 4g will fit through most 00g tunnels and larger. These are designed to fit through tunnels in gauged piercings and measure 1 1/4" in diameter. They look heavy but are actually virtually weightless.
These are the mini version of my full size Tesla Hoops, which you can see here. I love this smaller size for everyday wear, for when you are pole vaulting or something and can't wear mega hoops, or for winter when you are wrapping up in a big old scarf and don't want your hoops to get in the way. These are perfect for that!
The lovely @missmagissa is modelling these 4g mini Tesla hoops in the first photo. John is modelling the smaller, 6g hoops in the last photo, available here.
Named after the great inventor and showman, Nikolai Tesla. Here's a quick video showing how to take off and put on my Tesla coil hoops.