Connects onto an existing HVE coupler or saliva ejector. Isolates 2 quadrants at once, providing tongue and cheek retraction. Continuous suction allows control of moisture and humidity throughout the oral cavity. Suction evacuates 6 liters per minute. Removes 3.59 liters of water per minute; removes 7.3 cu. ft. of air per minute. Biocompatible polymer.