4 different styles and two sizes available in each shape! TRAINER for the entry level explorer and MASTER for the experienced ass-master. Utilizing a revolutionary new material consisting of dual layers of matte and shine surface treatments, these non slip vibrating tools have smooth entry points for pure anal enjoyment. Produced in the USA using anti-bacterial Sil-A-Gel, these tools are safe to use and easy to keep clean. Uses 2 AA batteries, not included. Dimensions: 19.1x2.8cm / 7.5"x1.125"