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Bard 800-0216 Cooling Cap Tubes are OEM refrigerant metering tubes used in Bard wall-mounted air conditioning systems to regulate refrigerant flow into the evaporator for stable suction pressure, proper superheat, and consistent cooling performance. If your unit is icing up, running with poor capacity, or has a suspected restriction after a sealed-system repair, replacing the cap tube set with the correct Bard 800-0216 part helps restore factory-designed refrigerant control and protects the compressor from abnormal operating conditions. Because cap tubes are sized for specific Bard model and capacity combinations, confirm the part number against your unit model and serial before ordering.