For those who want serious sack stretch, the OxBalls ULTRACORE system is built to deliver. This two-piece set pairs the CORE ballstretcher with the AXIS power-ring for a combined squeeze that goes well beyond what either piece can do on its own.
The CORE ballstretcher features outer ribs that help it stay taller on your sack, plus a padded grip in the middle for a firm bag-squeeze. The inner smooth tunnel has an hourglass shape that holds the stretcher exactly where you place it – no constant readjusting. Slip the rubbery AXIS power-ring over the CORE’s middle rib grips and the channel ribs inside the AXIS lock onto the outer ridges of the CORE, doubling the squeeze effect for maximum stretch.
Two pieces, one seriously stretched result
Both pieces are made from OxBalls’ extra-soft Plus SILICONE blend – smooth and velvety against the skin with just the right amount of firm grip. To get started, use a little lube or spit, stretch the CORE and drop your bag through, then position it where you want it. The hourglass inner shape holds it in place. When you’re ready for the full ULTRACORE experience, slide the AXIS ring onto the CORE’s middle ribs and feel the difference. Compatible with both water-based lubricants and silicone-based lubricants.
FAQ
What is the ULTRACORE system made from?
Both the CORE ballstretcher and the AXIS power-ring are made from OxBalls’ extra-soft Plus SILICONE blend, which gives a smooth, velvety, comfortable stretch with firm grip.
How do you use the CORE and AXIS together?
Stretch the CORE and drop your sack through, positioning it where you want it – the inner hourglass shape holds it in place. Then slide the stretchy AXIS ring over the CORE’s middle rib grips. The channel ribs inside the AXIS lock onto the outer ridges of the CORE, adding double the squeeze effect.
What lubricants are safe to use with this set?
Both water-based lubricants and silicone-based lubricants are safe to use with the ULTRACORE system.
Order today and enjoy discreet delivery across Australia, straight to your door.
ULTRACORE set – what’s in the box
- CORE ballstretcher with outer ribs for extended stretch
- AXIS power-ring with channel ribs that grip the CORE’s outer ridges
- Inner smooth tunnel with hourglass shape holds position
- Padded middle grip for firm bag-squeeze
- Double squeeze effect when AXIS is combined with CORE
- Made from extra-soft Plus SILICONE blend
- Compatible with water-based lubricants and silicone-based lubricants

















Reviews
There are no reviews yet.