Soft silicone rings that will stretch and move with your scrotum's changing tension. They are lightweight to maintain your stretch when weight is unable to be used or when a break from weight is required.
Is it a delectable torture device? a domination machine? a self indulgent treat? The perfect ball stretcher and scrotum training device? I guess it's all of these and more. The Screwball
The vacuum pump has been designed by Dave Smith and is for Ball Stretchers (as opposed to ball pumpers).