3M PPS Mix Ratio Inserts help mix paint according to manufacturer guidelines for the 3M PPS (Legacy) paint preparation system. Mix ratio inserts are available for various cup sizes and manufacturers. 3M PPS is a complete painting system that allows the painter to measure, mix, filter, and spray paint materials. Product Features:Mix ratio inserts assist in the measuring process with 3M PPS (Legacy) paint preparation system3M PPS is an all in one disposable solution for measuring, mixing, filtering, and spraying of paint materialsSystem enables the painter the ability to consistently spray at 90 degree to the part, no matter the part orientation (even upside down)The all in one solution reduces the chance of outside contamination and reduces paint consumptionPPS reduces cleaning solvent consumption by up to 70 percent and reduces prep and clean up time by up to 50 percentSystem delivers improved quality, lower material cost, less solvent consumption, improved productivity, less mess and easier use