Open box New item! Up to 180% more effective than floss for healthier gums Quad Stream delivers four wide streams of water that penetrate deep between teeth and along the gumline, covering 9x the surface area of single stream water flossers Removes up to 99% of plaque from below the gumline 2 flossing modes, 10 intensities Countertop Water Flosser has large water reservoir of 550ml and securely fits in the bathroom 360-degree nozzle rotation ensures you can reach every corner of your mouth when water flossing