This massive bullet delivers deep, rumbling vibration Packing multi-speed buzzing capabilities for internal or external use, this sleek bullet was made for intense action. Experience the powerful vibration reverberating through the whole shaft Use it on its own, or insert it in a penis sheath to create a customized vibrating dildo. The Thunder Bullet is waterproof, making it the perfect accessory for a steamy shower Measurements: 8.25 inches in length, 1.5 inches in diameter. Material: ABS Plastic. Color: Grey. Note: Requires 2 C batteries, not included. Not intended for internal anal use.