With 3 sizes 16 mm, 18 mm, and 20 mm. This pack will provide a comfortable fit for most men.

Useful in the sack, staying engorged or even some BFR work.

NOTE: There are some markings on the rings. It's undetermined if they will hurt the longevity of the rings.

FOR SAFETY DO NOT WEAR A RING FOR MORE THAN 40 MINUTES ERECT.