Don't think anyone knows what these are. Might want to give some background info on them. They look like a threaded body "ground control" type coilover setup for a standard lotus shock.
If so, it gives you the ablity to use narrower diameter standardized racing springs from the major manufactureres so you can easily change your spring rate, plus the narrower diameter spring typically gives more room for wider wheels/tires.
The threaded body allows you to lower the car, but at the expense of overall travel, unlike a traditional coilover.