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Bard part number 800-0203 is an OEM set of cooling cap tubes used in select Bard wall mounted air conditioner refrigeration circuits to meter refrigerant flow and maintain correct operating conditions across the cooling system. When capillary tubes are restricted, damaged, or have been opened during a sealed system repair, replacing them with the correct Bard factory part helps restore stable pressures and proper cooling performance. Because cap tube sizing and routing are application specific, confirm compatibility by matching the full unit model and serial number or referencing the correct Bard parts list before ordering.