These are our new, easy to use hand stroke pumps that will transfer liquids from a standard 15, 30 and 55 gallon drum. The two models can produce any amount up to 8oz or 16 oz per stroke. These are self priming. These come with a connection for industry standard drums. This has a good design and is dependable. The polypropylene material can move a variety of liquids such as alkalizes, detergents, waxes, oils and most mild acids. This is industrial grade and built for everyday use.