This stretch to fit, double cock ring system adds girth, texture, and vibration to your stroke Splash proof and easy to use, just slip it on and turn on the included bullet vibrator, for powerful stimulation for both partners, simultaneously The double ring system also helps control blood flow, for an enhanced erection and more staying power. Turn your rod into their favorite vibrator and enjoy incredible sensation with this fantastic toy Measurements: 1.25 inches in diameter unstretched, 3.75 inches in length. Material: TPR and ABS. Color: Black. Note: Requires 2-LR1130 tab batteries, included