Mix ratio printed on film insert. Accomodates mix ratios required for PPG Paint. For use with the 650 mL cup. Used with 4:1:2, 4:1:1:1, 4:2:1:1, 4:2:2:1, 5:1 ratios and 3M Tri-Scale. Tip: Film inserts must be placed between the hard cup and flexible liner.