Teased, volume hair is within reach with our clip-on hair piece. Pro Pump is creatively designed to help you get the bumped up volume you want in minimal time. Pro Pump is 13 inches long. Underneath the 100 percent human hair is a mesh cap that measures 4.75 inches long and 5.75 inches wide. The cap is surrounded by adjustable wires so you can get the perfect amount of volume for every hairstyle. Each Pro Pump is 75 grams of real human hair. Step-by-step instructions are printed on every package, so you can easily apply Pro Pump in minutes.