The Vac-u-lock plug with snaps is intended to be used with your Vac-u-lock harness. Made from hard rubber, it is a good beginner harness accessory, but it will really become uncomfortable for the deep down bump and grind. If you have it on without panties or other underwear, it is very easy for hairs to get caught in it that you really don't want to.

Made of hard molded rubber, this has a safety rating of a 3, so I would advise keeping it clean and using with some care. Compatible with any Vac-u-lock harness, it is an easy fit. Made to be used with mounting powder, it is very easy to attach your Vac-u-lock accessories.

Designed with vacuum sealing in mind, it has three gradual decreases in size that have sharp angles. I would not suggest using this alone, unless you are into discomfort. This is red in color, but I have not found any other colors available.

This item only comes in one size. If you are a dainty lady, I do not know if this would hit those ever-so-sensitive pelvic bones. Be warned: this is very hard.

I believe that this worked fully to my expectations. I knew when I bought it that it may not be comfortable for harsher use. I am all in all pleased with the performance; it never came unsnapped or loose. I did find, however, that it started to chafe right at the groin tendons; that was a bit annoying.