The new locking design enables it is more fit to human body. The cage is inserted into the inside of the ring. Once the cage in place, it is impossible to remove the device.

Material: Bio-sourced resin .

Numbers of air vents: 3

The whole set contains:

1. 4 different size of rings.

2. 1 Cage

3. 1 Magic Locker (high quality) with 2 keys.

V4 rings are not compatible with V3 cages.

4 different Rings: 36mm/40mm/45mm/50mm

Also provide 55mm size ring , if you choose : Just a 55mm size ring alone ,there will only a ring in package .

Cage size: the cages diameter is about 32mm

Warming Tips:

Resin has the characteristics of expanding with heat and contracting with cold. 

If the received item presents the following situations, such as deformation, unfitness of ring and cage, just soak this item in the hot water for two minutes and then it will be normal, which is the feature of the resin, not the quality issue of this item.