The MI515-100 kit offers high-quality, ready-to-use reagents for Milwaukee's Turbidity Meter MI415. It includes: 1 x 30 mL 0 (FNU), 1 x 30 mL 10 (FNU), 1 x 30 mL 500 (FNU). To calibrate, place the vial in the cuvette holder, press 'cal', and follow the prompts for 0, 10, and 500 (FNU) calibration. After calibration, your meter is ready for use.