Scrubbing Bubbles Heavy Duty Fresh Brush Refills feature a penetrating foam that works to break up limescale along with hard water stains, and they're easy to discard after using.;No germy brush;An advanced formula provides 4-in-1 cleaning power: eliminates odors, removes limescale, and cleans under the rim and below the water. to store;Heavy-duty pads tackle tough stains