The Granular Pneumatic System (a.k.a ‘GPex’) adds color directly into the truck with no mess and no water. The system offers all of the benefits of the traditional liquid ColorSelect® system with no water involved. There is no freezing and minimal impact on mix design. Using a high-volume, low-pressure vaccuum, granular pigment is quickly, quietly, and accurately dosed dust free. The Granular Pneumatic ColorSelect System represents the pinnacle of pigment dispensing technology.