Graco 24F893 ProPack Portable Spray Pack for TrueCoat Pro Paint Sprayer Comfortable, ergonomic backpack evenly distributes the weight on your back allowing you to move freely for a longer spraying time Separates the truecoat Pro cordless airless paint sprayer from the cup to spray in any angle - ceilings, walls and floors Pressurizes the material for maximum spray pressure at the gun allowing for up to five hours of operation on a 9V battery 25% lighter weight allows for a longer period of spray time with less fatigue Includes pockets for storing tips attached to backpack and softback design makes spraying longer, easier