The cage has a glans pee opening
Smooth surface, stainless steel material, safe to use
Two styles of rings, Round rings and Arc rings, each ring has 4 sizes, please check the size you need when purchasing
How to Measure a Snap Ring
For reference only, not as a basis for purchase
Find a thin, non-elastic wire, twist it around the base of the JJ, and measure the length of the wire. This length is the circumference of the JJ root.(as shown below)
Straighten the wire and measure the total length (as shown below)
Ring diameter: 14 divided by 3.014 is approximately equal to 4.45 cm (the measurement method is for reference only, not as a basis for purchase)
Divide the circumference by 3.14 to equal the diameter. In general, choose a ratio that you measure, and it is best to use a slightly smaller diameter snap ring, or choose several snap rings with similar values. (Elastic and comfortable, very loose and easy to fall off, if you wear it too tight, you will not be able to wear it)