XtractMAX self-cleaning compressed air-powered vacuums combine up to 45 gal of usable storage and great suction with 99 percent filtration efficiency, down to 0.5 microns. Now you can use your existing plant air to create a powerful, versatile vacuum cleaner. Our unique reverse pulse filter cleaning system ensures maximum efficiency. The push of a button produces a jet of 90-psi air, blasting collected material from the filter, completely rejuvenating it. No electricity is required.