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 /Asset/a1496.jpg /Asset/a1496.jpg 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