Features: For expanding soft tubing when carrying out installation of pipes in Plumbing, heating, gas, refrigeration and air conditioning systems.This hydraulic tube expander kit contains 7 expander Heads, convenient to meet different working needsNo copper coupling needed any more, save cost material.Only one side need to be welded, save cost and reduce possibility of leakUsed for soft copper tube, Aluminum tube, tube, soft steel and other soft tube Specifications Model CT - 300A 7 expansion heads CT-300A (Imperial) : 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8" Weight 4000g Six Easy Steps 1. Deburring inside of tube. 2. Anneal the tube if necessary (for hard or thick wall tube). 3. Screw the expander head on expander. 4. Put the end of tube on expander head. 5. Tighten the relief value knot to 'on' position then pump handle until tube is expanded to the end. 6. Turn the relief value knob to 'OFF' position to loosen expander head. Remove expanded tube. Package Included 1 x Hydraulic Tube Expander,1 x Tube Cutter, 1 x Inner-outer Reamer, 7 x Expander Heads, 1 x Box