Nexus O is a hands-free toy that is made from phthalate-free, super soft silicone for added comfort and flexibility. The Nexus O is made up of a three-ball design that works to stimulate the G-spot and also provides a secure fit that can even tickle and delight the perineum. The Nexus O is specially made and designed for men who want to experiment a bit with anal play. The Nexus O stimulates the prostate or the male G-spot and the perineum area. These two areas play a pivotal role in controlling and increasing a man's erection, orgasm and of course, ejaculation. These spots are ultimately are the command centers for his sexual pleasure. The Nexus O can enhance the strength of a traditional orgasm while he plays with his dangly bits or even during sex play. The Nexus O can also be used during foreplay for extra excitement. The Nexus O can be used on either male or female. The Nexus O ring diameter is 1 inch, O ball diameter is 1.4 inches and with a O height of 3.9 inches. The Nexus O is waterproof so you can play water sports. Nexus O can also be used with any water-based lubricants.