Used 0.75 square meter Estrella (Switzerland) Glass Lined Nutsche Filter, 36 inch Diameter, Rated FV and 50 psi internal at 350 Deg. F. Glass type 250S tested at 12000 volt, serial no 21623, Fab no. 84081, National Board no. 51, 165 gallon volume, manual hydraulic lift, on base, built 1984.