Ok so this toy is awesome, the sensation of the pumping is simply sensational! The size of the cups is perfect for my male body. Directions state to use water-based lube to help to seal to the body. The seal is silicone rubber and is removable for cleaning. The pump is about the size of a fist and works fast.

I didn’t try and see how much the max vacuum is, but it definitely sucks hard enough that I wouldn’t want to see how far it goes. There are convenient measuring marks on the side of each cup. Releasing the vacuum is easy with the side button. The pump seems to be universal and can be used with other toys. I plan on using the pump on my other toys. The cups are quick disconnect and keep there vacuum when removed from the hose. This quick connection and disconnect is common for other toys and is compatible with toys of the same style. The size of the cup should work as a pussy pump. The sound of an electric pump is minimal. Overall this toy is simply exciting. I can’t wait to pump my partner's breast when she is tied up. Quality is also excellent.

I used this for the 2nd time recently on my partner. I had a problem with the red silicone rubber seals moving when her boobs were expanding. I recommend using silicone glue to attach them to the plastic chamber. She is a B cup size, and she fills about 1/4 of the chamber with a minimal vacuum. When the vacuum was high, she filled 3/4 for the chamber! Thanks for the reading.