This stainless steel push type soap dispenser dispenses Liquid soap at 10-20% solution as well as more viscous synthetic detergents, lotions and antiseptic soaps. We do not recommend any soap types that have an ammonium based surfactant, i.e.. Ammonium lauryl sulfate. This surface mounted unit is suitable for any type of wall material or construction. Drawn and welded construction of 20 gauge stainless steel. Easy refill top and keyed Lock filler Cap. The unit has a Lucite soap level indicator window and all mounting screws are concealed. Capacity of 40 oz. or 1.1 liters.