4 X BAXI DUO TEC 24HE 24HE A 28HE 28HE A DHW HEAT EXCHANGER O RING SEAL 248049Part No. 248049 This Part Fits The Following Appliances: Manufacturer Boiler Model Boiler GC No. Baxi Combi 105 E 47 075 08 Baxi Combi 105 HE 47 075 18 Baxi Combi 80 Eco 47 075 05 Baxi Combi 80 Maxflue 47 075 07 Baxi Combi 80 E 47 075 06 Baxi Combi Instant 105 E 47 075 09 Baxi Combi Instant 105 HE 47 075 19 Baxi Combi Instant 80 E 47 075 13 Baxi Combi Instant 80 He 47 075 17 Baxi Duotec 24 He 47 075 23 Baxi Duotec 28 He 47 075 25 Baxi Duotec 33 He 47