The Challenger 43 Series Pro Pak from National Vacuum Equipment is available in two models: the 4307, which delivers 560 cfm, and the 4310, which delivers 940 cfm. It comes in a sound enclosure with incorporated air ballast cooling, eliminating a silencer and allowing both blowers to run full vacuum full time, oil free. Packages are available in gearbox, hydraulic and belt drive for manual and automatic transmissions. They can be easily frame-mounted with various designs to accommodate any truck. 800-253-5500; www.natvac.com.
