The surface mounted soap dispenser is intended for any type of wall materials or construction. It features easy refill at top; keyed lock filler cap; Lucite soap level indicator window; and all mounting screws are concealed. It has a drawn and welded construction of 20 gauge stainless steel, type 304. with a brushed finish. The bulk filled reservoir holds 1.2 litres (40 oz.) of liquid soap and dispenses soap at 10-20% solution. It is not recommended to use any soap types that have an ammonium based surfactant, ie. Ammonium Lauryl Sulfate. Weighing 2 lbs. (0.9 kg.), it measures 3.825″D x 4.75″W x 8″H.