Dr Joel Anal Exerciser Kit. Set of 3 progressively sized, pliable and durable tapered probes. Over sized, angled suction cup base. Safe and pure for body and pleasure made using phthalate free materials Thermoplastic Rubber TPR. 3.5 inches by 1 inch beginner probe. 4.5 inches by 1.25 inches intermediate probe. 5.5 inches by 1.5 inches advanced probe.