For batches of epoxy smaller than one Mini Pump stroke, the 320 scale accurately measures the correct ratio of resin and hardener from 4.4 fl oz down to just a few drops. The scale can also be used to confirm the accuracy of your WEST SYSTEM dispensing pumps and to consistently add pigments or other additives. The scale comes in a convenient kit for small projects. The kit includes dispensing bottles, 3¼ oz and 1 oz plastic mixing cups, mixing sticks and pipe cleaners