The undercarriage and rocker panel blaster is specially designed to thoroughly attack any dirt, debris and snow on the lower portion of your vehicle. For use with the high-pressure pump option, the undercarriage and rocker panel blaster consists of 11 stainless steel nozzles; 3 on the undercarriage and 4 on each rocker panel blaster. For use with non-high-pressure systems, it consists of a medium pressure 5 hole undercarriage manifold.