2-1 Ratio Pumps - Identical pumps, to have a accurate measurement they need to be pumped at a ratio of 2 pumps on the resin side to 1 pump on the hardener side.

Pumps fit all size containers from Quarts to gallon size, the feed tube can be trimmed for use in smaller bottle.
ALL PUMPS HAVE A 38MM SCREW TOP

General Pump Use When Purchasing The Thick Resin or Table Top epoxy: Although these pumps do fit our Thick Epoxy Resin Systems, due to the thick viscosity of the Resins it can make dispensing the resin quite difficult and time consuming. It is generally better to use our graduated plastic mixing containers to properly measure and mix the thicker systems.