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Strong Function – This Copper Pipe Expander Tool ensures tight universal coupling for air conditioner installation, preventing cracks and deformation. Durable Material – The Tube Expanders Kit is made of strong roller bearing steel with a smooth finish, secure fit, and long service life. Practical Sizes – Includes 6 expander heads in 7/8", 3/4", 5/8", 1/2", 3/8", and 1/4", keeping copper pipes ductile and leak-free. Easy Operation – Lightweight, portable, and quick to use, ideal as a pipe flaring tool or replacement for old expanders. Wide Application – A must-have HVAC tool for refrigeration repair, maintenance, and copper tube expansion in both home and professional use.