Unipolar set of 3 cockrings on 2.5mm plug

Made of highest-grade aluminum, these new insertables are solid, durable, and extremely comfortable.  Aluminum takes less power to operate and is more affordable than the comparable stainless steel models.  They come with a 2.5mm plug and 4mm banana connectors, use only 2 of the 3 at a time, or a Y cable or triphase setup. 

Inside diameters are 36, 42, and 46mm. (1 inch = 25mm)