The ULTRACORE system is for the really big players who like to stretch their scrotum to the max! You get the fantastic CORE testicle stretcher - it has outer ribs for a super long stretch: it sits higher on your scrotum with more cushioned grip in the middle for a greater scrotum squeeze. It also gets the AXIS rubber power-ring that grips the sides - it has channel protrusions on the inside that merge with the outer protrusions of the CORE stretcher.

CORE is a fantastic scrotum stretcher in its own right - on your testicles, the smooth inner tunnel wraps around your scrotum with a medium-firm grip, but add the AXIS power-ring on top of the notched CORE and you get MAX BAG SQUEEZING. We sweat the BIG stuff when we design for your scrotum's needs, we think more about new ways to stretch it further - we do a lot of research on scrotums, seriously, we look after your testicles a lot - we see stretchers stacking our rings for insane tightness - Ultracore has the features to maximise your stretch. 

HOW TO USE: a little lubricant or saliva, the sweaty shower at the gym is fine, stretch the CORE and drop the scrotum and adjust it where you want it, the inner hourglass shape will stay where you put it. If you want a maximum tightening effect, slide the AXIS elastic ring onto the centre rib of the CORE to grip it... Made with our extra-soft Plus SILICONE blend, it will keep the grip firm enough with a soft, velvety, comfortable elasticity and just the right amount of grip for extra play. Oxballs makes the best scrotum stretchers for all types of testicles, all sizes and desires. We use our gear, we play with our gear, we test our gear to make sure you get the best designs with the coolest features and new ways to play hard.