Don't let the size of this small vacuum hand pump fool you. It has been built with a heavy duty housing and will pull all the vacuum that you would every want. It can be used for an assortment of items including penis and clit pumping as well. It is primarily sold to be used with the vacuum electro-cups, as it has a special rubber tip that fits perfectly over the one-way valves on the cups. Once the cup is in place and the amount of vacuum you need to hold it firmly in place, the pump can be removed and the cup stays put until you release the small one-way valve on the cup. It also comes with a 34" extension hose and a vacuum connection tip on the other end.NOTE: If you need the male small white plastic end with an O-Ring and a piece of clear hose to go with it for using with the one-way penis, clit and breast cylinders, check this option in the Drop-Down Box below to get this in addition to the regular hose that is included with the pump. This item will look like this: It fits into a female one-way coupling that is normally found on the top of a penis pump. There is not a one-way valve inside the tubing on this pump. The rubber tip can be removed to expose the 1/4" to 5/16" diameter taper tip and other tubing can be used to create a vacuum for other devices such as penis, pussy and clit cylinders. The pump measures 9" long. Cylinder can be taken apart if necessary for maintenance and cleaning.Cleaning and maintenance instructions are included to make your pump last for years and pull maximum vacuum.