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Specifications: Item Type: Tube Bender Material: Aluminum Alloy Color: Blue Bend Radius: 0-120° Reference Mark: 45-90° Application: Suitable for 1/8 inch (3mm), 3/16 inch (4mm) small pipes, 1/4 inch (6mm), automotive fuel pipes, air conditioner refrigerant pipes, etc.Also suitable for bending round copper tubes, aluminum tubes, copper tubes.How to use: 1.Lift the handle of the pipe bander, and place the tube in the correct channel size.Make sure the top of the tube is in contact with the support (Figure 1).2. Mark the pipe that needs to be bent, make sure the handle "0" matches the o; slowly lower the handle until the "o" matches the desired angle (Figure 2 shows the position of the angle of the 45 degrees).