We are the manufacturer of brass flange for tubular heatingelements. Main products are:- 5/4 inch screw flange- 6/4 inch screw flangeVariety of types include brass flange for:- single heating element (two holes for oneU-shaped tube)- single heating element with thermostat (two holesfor one U-shaped tube + one hole for thermostat tube)- single heating element (two holes for oneU-shaped tube) + threaded hole for magnesium anode- double heating element (four holes for twoU-shaped tube)- double heating element (four holes for twoU-shaped tube) + threaded hole for magnesium anode- tripple heating element (six holes for twoU-shaped tube)