The Pulse-Bac PB-550 from CDCLarue Industries, a portable compact dust vacuum for hand tools, now features a window that allows the user to see the Pulse-Bac Automatic Self-Cleaning Vacuum Technology purging the dust and debris off the filters along with the level of dust and debris inside the tank. The PB-550 is 25 in. tall, 16 in. in diameter and capable of generating over 121 cu. ft. per minute of air flow with 74 in. of lift. The PB-550 also features an advanced filter filtration system with a two stage filtration process that is in compliance with the 2010 EPA standards for dust control.