TetherSpout Device is desiged for someone who has chastity requirement but non-piercing.It can be used separately or used with cage.
Want to know more about it,visit this link. http://tetheredchastity.blogspot.com
Here are the two sizing Sounds/dilators that are available.
To figure out which sound/dilator is best for you, try this suggestion: measure the vertical length of your slit while flaccid and without stretching it (the outside is elastic, unlike the inelastic part further inside). If it is at least 14mm (0.55") in length, get the 10.5mm-15mm sound. Otherwise, get the thinner 5.5mm-10mm sound.
But it is always better to get both sizing sounds.
Here are 3 existing combinations of TetherSpout.
barrel diameter 6mm
flange diameter 8mm
4 retaining rings' diameters 10mm and 11mm,12mm,13mm
barrel diameter 7mm
flange diameter 9mm
4 retaining rings' diameters 11mm and 12mm,13mm,14mm
barrel diameter 8mm
flange diameter 10mm
4 retaining rings' diameters 12mm and 13mm,14mm,15mm
Tip: the screw is to "bite" the solid wall, not screw into the tether hole.No need to twist screw wrench with big force to bit the wall, when screw in the screw.You can stop when you feel the twist become a little tight.