Specialty Pumps for Epoxy Resin (1 Pair - 2 Pumps Total). These pumps are used with our epoxy resins and are an easy way to help you determine your mixing ratio. The pumps can be used with our 2:1 , 3:1 and 4:1 epoxy resin systems. They have an extension tube which will allow you to reach the very bottom of the bottle to fully empty the container. These pumps are a quick and easy solution for accurate measuring and keeping your shop clean.