This is a HVAC evaporator and condenser coil fin combing set. Each order is for two tools: (1) metal coil cleaning / fin straightening brush + (1) plastic six-in-one comb for straightening damaged and bent aluminum coil fins and deep cleaning (featuring comb sizes for fin spacing 6, 8, 10, 12, 14, 15). Between these 2 tools you can easily clean and straighten air conditioning and refrigeration condenser coils and evaporator coils.