The Great Extender Vibrating Sleeve Black from Nasstoys of New York. Vibrates and adds length.Flexible and stretchy. Tight cockring with scrotum cradle. Phthalates free. RoHS compliant materials Sleeve Thermoplastic Rubber TPR, Bullet vibrator ABS plastic. Size: length 6.5 inches.Vibrator requires 2 LR44 (AG13) batteries included..