Double the delight! The Double Jelly Penetrix is made of soft jelly material. The double penetrator has a adjustable harness sized to fit most. The Penetrix has two phallic shaped vibrators, both with internal bullets. The larger vibe has a usable length of 7in with a diameter of 1.625in. The smaller vibe has a usable length of 3.75in with a diameter of 1.5in. The double penetrator attaches to a dual control multi-speed controller. Requires four AA size batteries, not included. Strap on and strap in for full satisfaction!