Tough Guy 10 inL Polypropylene Replacement Brush Head Scrub Brush, Not Included 3NB72 Capacity 12 oz The unit requires a rough The unit requires a rough opening that measures 11 5 8 inches in width by 10 7 8 inches in height and can be used in walls and other hard surfaces that are 3 inches to 5 1 2 inches in thickness Class K fire extinguishers combat kitchen fires that involve flammable cooking ingredients such as animal and vegetable oils and fats Dual angle plastic block and crimped polypropylene filament holds liquid for scrubbing at high and low angles Protects against microbial cross contamination by assigning specific colors to each potential area of contamination