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 and is made out of tough and durable ABS and SAN plastic for extended lifetime. THe see-thru tank indicates the level of soap remaining; dispenser can be removed from mounted backplate for easy cleaning. ADA compliant and field tested foam pump mechanism lasts several thousand cycles. Tested and proven to work with many name brand bulk foam soaps - proven to provide rich, thick foam. Environmentally friendly design uses a "bag/box-less" refill reservoir to reduce packaging waste of captive systems that handles most foam soaps and bulk foam sanitizers from 0-14 centipose (cps). 1 dispenser each.