Available in two length sizes - small/medium (4.5 inches) and medium/large (6 inches), this Penis Tube is one for the braver men out there. With three spikes on the inside of each stud that goes along the shaft of the tube and three solid metal cock rings (with an internal diameter of between 1.25 and 1.5 inches), pain for your cock is guaranteed. This cock and ball torture toy also has fully adjustable buckle fastening leather straps.