CPU: CLEANING POWDER UNIT. SMALL CONTAINER USED TO HOLD CLEANING POWDER WHEN CLEANING LEVELUK MACHINE. IMPORTANT: PLEASE CHECK YOUR MACHINE'S FILTER. IF YOU HAVE A HG-N FILTER THEN THIS IS THE CORRECT CPU. YOU CAN ALSO CHECK FOR THE INDENTATIONS ON YOUR FILTER (SEE PHOTO 2). IF YOU HAVE A HIGH GRADE FILTER THEN YOU NEED TO ORDER Cleaning Cartridge (HG Unit) Amanda Bobbet.com WILL NOT BE RESPONSIBLE FOR INCORRECT SUPPLY ORDER. WILL FIT K8.