Is it possible to use this with a dildo?
Even if it's vac-u-lock compatible, the balls will help hold it in place.
I understand that the Plug ca will be removed, but I am not sure which size of ring they include.
Two rings are included, one is a 1.5" inner diameter and the other is a 2.
Is it possible for this to be used by a man?
The harness has a high opening that allows access to the genital and anal areas while it is worn by men or women.
What size dildo can the orings support?
If you are using a flared base dildo, there are 3 rings that will fit most girth sizes.
Is it possible to use any dildo with this, or only the vac U lock hung?
Yes. Any dildo with a flared base can be used with this as you can switch the plug out and place an o-ring on instead.