Pump up the volume with our clip-on hair piece. Pro Pump is a fun way to create a variety of new hairstyles without a lot of time or hassle. Each pump is composed of a mesh cap with flexible wiring that allows you to quickly add a little, or a lot of volume. The cap is 5.75 inches wide and 4.75 inches long. Every Pro Pump has 13 inches of 100 percent human hair that is blended with your own hair to create a polished look. Pro Pump is 75 grams of hair. There are four clips attached to each hair piece, three at the front and one in the back. The clips are polymer-coated so you can comfortably wear Pro Pump as often as you want without damaging your natural hair.