It is very important that your vacuum system can handle the use of all HVE lines running at the same time. The video on the home page is how the A~flexX HVE Assist Arm should be working. This device is designed to pull aerosol away from the operator via the dental office’s own vacuum system. If you purchase the A~flexX HVE Assist Arm Kit and it is not pulling aerosol into the funnel system as shown in our video. Then your vacuum system is not adequate for optimal aerosol control. (NOTE: If your vacuum is not strong enough to use our device it most likely will not be effective for any device except direct use of the HVE following your ultrasonic instrumentation).