Pure stainless steel rings connected by leather. Comes with 4 standard 2mm pin jack connectors. Connect to 2 or 4 to use 1 or 2 channels for stimulation. Unlimited sensations are possible depending on which rings you choose to use and the pads or insertables you pair with them.
The 3 smaller rings have a diameter of 4cm (1.6 inches), the largest 1 ring has a diameter of 5cm (2 in).