The OptiFill Final Step Sanitizer System is a maintenance-free manual ware washing program for 3-compartment sinks. It delivers an accurate dilution without the need for equipment or permanent connection. Recommended for use as a sanitizer in public eating places, and food processing equipment and utensils. Consistently dispenses accurate solution and eliminates need for manual dosage. No installation or equipment costs and so easy to use there is minimal training. - Volume 2-1/2 L - Sold per each