Quick and easy to refill; each reservoir is marked "FOAM SOAP" to insure proper use. Each stroke dispenses 0.4ml of liquid in the form of foam soap. The 9336 made out of tough and durable ABS and SAN plastic for extended lifetime. The see-thru tank indicates the level of soap remaining; and the dispenser can be removed from mounted backplate for easy cleaning. the ADA compliant and field tested foam pump mechanism last several thousand cycles, and is tested and proven to work with many name brand bulk foam soaps - proven to provide rich, thick foam. The environmentally friendly design uses a "bag/box-less" refill reservoir to reduce packaging waste of captive systems. It can handle most foam soaps and bulk foam sanitizers from 0-14 centipose (cps). 1 dispenser each.