Many clinical studies, as well as our own user data, indicate that penile traction therapy can both increase the overall size and straighten your penis.

How Our Extenders Work

Thousands of Clinical Trials have enabled us to design and innovate the most comfortable and customizable penile traction therapy device on the market.

Why We Are the Best

Penile Curvature Correction Devices

X4 Labs™ offers a wide variety of Penis Extenders specifically designed to treat curvature typically caused by Peyronie's Disease using feedback from doctors and patients alike. Straighten your bent penis over time just by simply wearing your device.

View Our Straightening Editions