123 chambers. Plates are made from non-reinforced, molded, pressure-resistant polypropylene. Cake thickness is 32 mm. Filter frame is heavy duty construction from A-36 steel with Stainless steel covered side rails assembly to support the filter plate stack. Closing device is hydraulic and automatic. The press is furnished with recessed chamber plates in center feed design with closed filtrate discharge and filtrate discharging through four corner ports.