Style A:
The cage and ring are locked by Magic lock.
There are no tubes inside the cage.
Cage inner diameter: 33mm/35mm.
Anti erection column diameter: 20mm.
Anti erection column length: 36mm.
Catheter length：145mm.
One set includes:1*Cage,1* Ring,1*Stainless Steel anti erection column,1*Silicone Catheter,1*Magic lock and 2*Keys.

Style B:
The cage and ring are locked by Magic lock.
There is a tube inside the cage.
Cage inner diameter: 35mm.
Tubeinner diameter: 29mm.
Anti erection column diameter: 20mm.
Anti erection column length: 36mm.
Catheter length：145mm.