This part fits: * POTTERTON SUPRIMA 100 (GAS ASSY AND COMBUSTION CHAMBE) * POTTERTON SUPRIMA 30 (GAS ASSY - COMB CHAMBER) * POTTERTON SUPRIMA 30 HE (HEAT EXCH. - FLUE - BURNER) * POTTERTON SUPRIMA 30 L (BURNER ASSY) * POTTERTON SUPRIMA 40 (GAS ASSY - COMB CHAMBER) * POTTERTON SUPRIMA 40 HE (HEAT EXCH - FLUE - BURNER) * POTTERTON SUPRIMA 40 L (BURNER ASSY) * POTTERTON SUPRIMA 50 (GAS ASSY - COMB CHAMBER) * POTTERTON SUPRIMA 50 HE (HEAT EXCH. - FLUE - BURNER) * POTTERTON SUPRIMA 50 L (BURNER ASSY) * POTTERTON SUPRIMA 60 (GAS ASSY - COMB CHAMBER)