BA-04 Lock Mechanism:proprietary security screw(Most Recommended) you need to use the

you need to use the sizing sounds to try to find out which size cannot pass through the urethral orifice

spring snap function doesn't work

5mm bar gauge

Length is your PA depth

BA-04 Lock Mechanism:proprietary security screw(Most Recommended) you need to use theMaterial: Stainless Steel TitaniumThe below 3 sizes is must needed: 1. Chastity Cage Overall Length2. Penis Tube Inner Diameter 3. Base Ring Inner Diameter For other sizes,such as the gap between base ring and penis tube,it is around 10mm by default,but it is customizable too,so if you have demand on this size,you can specify this size in the corresponding text box. For more style details,such as you don't need scrotum bar,PA hook,. etc. you can