The Colt Rotating Beaded Probe features an impressive girth and length. With two bands of synchronized rotating metal beads, a strong wiggling pronounced head, and high and low speeds, this probe will knock your socks off! It measures 8.5in L x 1.5in D at the jelly soft head and 1.375in D at the smooth shaft. Three AA batteries, not included, provide the rotations that will rock your world!