Quotes (0) FMSI > Air Conditioning System > A/C Tube Repair > Aluminum Joiners, Reducers Unions & Block Caps > Item # 5145 FMSIFMSI Air Conditioning SystemAir Conditioning System A/C Tube RepairA/C Tube Repair Aluminum Joiners, Reducers Unions & Block CapsAluminum Joiners, Reducers Unions & Block Caps Item # 5145 Item # 5145, Steel and Copper Tube Unions 5145Steel and Copper Tube Unions Request Information Email This Page Download PDF Download PDF Printable Page Close Window Joins Steel to Steel Tube Steel to Copper Tube Copper to Copper Tube Unit of Measure Imperial Metric Both Specifications Size N/A 3/8 in