Made of high quality materials, durable. Unfold the copper tube so that the two copper tubes are connected with each other when installing the air conditioner. Need to be installed on a hand drill. Only the tube expander, not including the demonstration of other accessories in the picture. You will receive a tube expander, which can meet your . Name:tube expander Pay attention to: This product needs to be used with a drill, and it is recommended that the power of the drill be above 550W. Pay attention to safety protection when using. Colour:Black Material:copper + aluminum Size:1/4inch (6mm), 3/8inch (9mm), 1/2inch (12mm), 5/8inch (16mm) Package Contents: 1 * Tube expander Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.