High quality 304 stainless steel with a chrome finish, Not nickel chrome plated like most other available on this site. High quality metal work, no weld spots, rough edges or cheap fabrication New style hidden lock system - won't catch on clothing like a conventional padlock The back ring is ergonomically shaped for a comfort fit, the urethral tube is removable and can be trimmed down to the length required Cage length: 35 mm. Cage Diameter: 33 mm. Back ring diameter: 50 mm Highest production quality without compromise, hand made and hand finished