Function: Consists of a durable plastic base and 3 nylon brushes. Ideal for cleaning cocktail glasses, wine glasses, mugs and other mugs. Mugs are thoroughly cleaned inside and out, which is quick and easy. PERFECT SIZE: Each brush has 19*10*19cm/7.5*3.9*7.5in, suitable for glasses and ceramic mugs, it includes 3 brushes, the brush head can be rotated to one point in either direction to ensure a good Scrub bar glasses NO BATTERIES OR POWER SUPPLY REQUIRED: Place the Cleaning Cup Brush in the sink, press down for suction, apply cleaner to the brush, wet and flip (flip) the glass, turn it back and forth on the brush to clean, then rinse. DURABLE: Easy to use, just place it in the sink, the suction on the base will grip the sink firmly. Package: 1 base, 3 brushes. Please allow 0~1 inch error due to manual measurement. Thank you for your understanding.