A pair of 2g (6 mm) threaders made of work-hardened aluminium closed with a silver plated, wire-wrapped copper spring. These are designed to fit through tunnels in gauged piercings. They are available in two sizes: a 2" diameter hoop, and a mini 1 1/4" hoop. Each 2" hoop weighs approximately 13-14 grams, while the 1 1/4" hoop weighs approximately 10 grams.
These are rustic-yet-shiny and are the largest gauge available in my Tesla threaders. Designed to be worn through tunnels, they will fit best through tunnels of 12mm or larger, but of course this will depend on the walls of the tunnel, etc.!
They are part of a collection of hoops inspired by the great inventor and showman, Nikolai Tesla. Here's a quick video
showing how to take off and put on my Tesla coil hoops.
The last photo is of my Tesla Hoops in a smaller gauge (available elsewhere in my shop), which illustrate the way the closure spring slides.