Endorsed by sexual health experts, tons of men's magazines, and many, many happy penis-owning customers, the HydroMax is (literally) the single best-selling hydro penis pump in the world. How's that for a great reputation?

A second-generation (maximized, if you'd prefer!) version of the beloved Bathmate hydro pump, the HydroMax5 has 35% more power and a redesigned bellows system that increases suction for quicker, more noticeable results.

The '5' in the name is a handy reference to the size of the penis that this particular pump works best for. If you're between 3 to 5 inches hard, this is the model for you! There are nice clear markings on the side of the box, so if you don't feel like getting out a ruler, compare your erection to the markings. You're good to go if you fall between the two orange lines.

Take a good look at the HydroMax5 before getting started, and read through the included instructions. Even if you're a complete pumping newbie, it's super straightforward.

Once in the tub or shower, you'll fill the inner cylinder with water and insert your relaxed (un-erect) penis inside. Push down on the cylinder to release excess water, lean back, relax, and let the suction work magic.

Your HydroMax5 consists of an extra sturdy polycarbonate cylinder marked off into clear measurements, a pliable, skin-safe synthetic rubber gaiter base, and a stainless steel spring release valve up top.

The HydroMax5 Penis Pump is certified skin-safe and easy to clean with soapy water.

This pump is for penises from 3-5'/18-13cm erect.