Manufactured from medical-grade, nickel-free stainless steel.Asylum Locking Chastity Cage Prince‘s Wand Penis Prison with a Removable Head Ring ZA092Length: About 70mm fixed on top of the cage and ring diameter: diameter of about 6 6mm teeth sliding ring 41mm: About 30mm ring (Dai Suo): 45mm catheter length: About 90mm hole diameter: About 4mm a copper padlock weighing about 215g.