Liter Dispenser offers an adjustable dose rate (0.76 ml., 1.2 ml., 1.54 ml.) that allows you to better control soap usage. Adjustable ring allows easy control of dosage. Soap reservoir eliminates soap waste & provides continuous service to customers. Translucent cover allows continuous soap viewing. The cover is as strong as a car tailgate. Locking mechanism helps prevent vandalism. Large push button is intuitive for easy use & ADA-compliant. Dispenser uses 1 liter refills that are induction-sealed for added safety. The seal is auto-punctured when installed in the dispenser to eliminate mess.