This is one of Mistress Loris Chastity devices. It is either a #6 or a #7. It is secured witha frenum piercing. This device is in brand new condition, having never been worn. It is constructed from surgical stainless steel.

www.chastitytube.com/device.html

Base ring is 2 inches in dia.
From the ring to the inside tip of the device is 3.23 inchs.
The frenum piercing is .125 inches in diamater, or a 10 guage piercing? (Not sure on this part )

The price is $250 firm, with free shipping to anywhere in the US, excluding Hawaii. If you would like more photos, please let me know!