The heavy Metal Dilator measures 8 inches in total length with the dilator itself measuring 6.75 inches in length and 5mm in diameter. Insert the dilator into the urethra of the penis for untold levels of pain. The metal is cold on contact with the skin but can also be warmed up depending upon your preference. To prevent the dilator from going in too far, there is a solid metal ball on the end which also makes gripping easier. The opposite end is tapered for easier insertion.