Feature:1. Used to expand the copper pipe when installing the air conditioner, so that the two copper pipes are connected to each other.2. The kit contains 6 different specifications of tube expander, which can meet the different needs of air conditioning maintenance.3. Made of excellent steel, has good oxidation resistance, and not easy to rust after longterm use.4. These tube expanders are accurately positioned and can be used with hand drills to save working time.5. Wide pipe expansion range, suitable for use with 520mm diameter copper pipes, flexible and stable operation.Specification:Item Type: Tube Expander SetMaterial: SteelSpecifications: 1/4in, 3/8in, 1/2in, 5/8in, 3/4in, 7/8inExpansion Range: Suitable for the use of approx. 5-20mm / 0.2-0.8in diameter copper pipes.Package List:6 x Tube Expanders