I agree that it is a cheaper version of the LG hanger.
I have used Size Master Pro. it is a cup sleeve handpump accompanied by a thigh wrap for strapping it to your leg. It took some time to understand the mechanics, and I ended up doing much more research. It turns out that I was doing everything wrong.
I got myself a Size Master Pro Max a few weeks back. The moment the package arrived, I knew I made a mistake. The suction cup is of decent quality. Everything else is a cheap knock-off. The extender is cheap. The sleeves are no good. The elastic band is held by Velcro, and is very weak.
There is a flimsy plastic clasp that is attached to the suction cup tip. This clasp is also fixed to the band with Velcro. I am not sure if it can handle 3lbs. I seriously doubt whether it can serve its intended purpose.
The tape is so-so, but the wraps can be bought from any store for 1-2 dollars. It is a cheap knock off that is not worth our money. Go for Phallosan, that thing is worth every single penny.