SUPP 1/2-71-L-40-ADFI 1/2" THREADED CONNECTIONS, BRONZE CONSTRUCTION, HORIZONTAL FLOW RIGHT TO LEFT, 5-40 SCFM SCALE VITON SALES, GASKETED CASE, ALUMINUM HOUSING WITH PLASTIC LENS, CALIBRATED FOR CO2, 100PSIG, 100F, LOCAL MECHANICAL INDICATION ONLY