Rapture Stainless Steel Cock Cage with Urethral Probe. Stainless steel tubular shaped cock cage with in integral urethral insertion probe. The probe is removable allowing the cock cage to be used without it. It is secured by a pin and locking ring that passes behind the testicles. A brass padlock in included. Includes an optional rubber sleeve over the hinge to prevent any potential pinching. The inside diameter of the tube is 1.375 inches (3.5 cm). The cage length is 2.5 inches (6.4cm). The inside tube diameter is 1.375 inches. (3.5cm). The ring diameter is 2 inches (5cm). A padlock and optional rubber sleeve are included. The probe is ¼ inch diameter and 1 ¼ long.