Kink Vibrating Silicone Butt Plug 4 inches Black. Perfect for all experience levels, this velvety soft silicone plug features a tapered tip for easy entry and a textured design for extra pleasurable backdoor stimulation. The looped base secures a removable 10 function bullet, which is easily controlled via handheld remote. UPC Code 782421059156. Total length 5 inches, insertable, usable length 4 inches, width, diameter 1 inch, circumference 3.5 inches. Functions 10. Material Silicone, ABS plastic. Kink by Doc Johnson is an exciting collaboration with Kink.com to create a collection of high quality authentic fetish items suitable for long term practitioners and new initiates alike.