Prostatic Play Explorer Silicone Cock Ring and Prostate Plug Black is part of the Master Series. This silicone cock ring and prostate plug provides targeted P-spot stimulation and erection enhancement in one tool. The premium material is non-porous, body safe, and sterilizes easily. The bulbous tip is ideal for direct prostate stimulation, while the firm ring provides maximum erection enhancement. Measurements Plug 4.5 inches in total length, 1.75 insertable, 1 inch in diameter. Cock Ring measures 1.75 inches in diameter. Material Silicone. Color Black.