【Material】: 3d printing, exquisite manual polishing, fine workmanship
【Item】: lock delay ring
【Size】: inner diameter 38mm/44mm/47mm/50mm/57mm (optional), width 6mm, thickness 3mm
【Package】: discreet packaging, protect your privacy.
(Note: Due to the measurement method and instrument, the factory production batch is different, the size may have a little deviation.)