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The hydraulic tubing expander is made of aluminum alloy. Light to carry. | Come with handy compact carry case for convenient cary and easy organization. | Includes 7 tube expander head dies to choose for different tube sizes: 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8". | With Manual hydraulic mechanism design, which can expand from 3/8" to 1-1/8" O.D. tubing easily with less effort. | Widely used for soft copper tube, alumimum tube,titanium tube,soft steel and other soft tube save cost material.