Easy Connection: Used to expand copper pipe, expand copper pipe and - easy to connect. High Quality Materials: This tube expander kit is made of high quality steel, which is wear-resistant, not easy to deform and durable. Note: When installing the air conditioner, it is necessary to install the pipe expander on the electric hand drill and unfold the copper pipes so that the two copper pipes can communicate with each other. Easy to carry: small size, easy to carry when going out, e.g. B. Installing an outdoor air conditioner Multiple uses: Can be used for air conditioners, refrigerators, vehicle air conditioners, etc. Item specification: Scope of delivery: 1 set Material: Bearing Steel Approximate Size: Specification Width: 7/8 (22.2mm), 3/4 (19mm), 5/8 (15.9mm), 1/2 (12.7mm), 3/8 (9.5mm), 1/ 4 (6.3mm) Height: The height of 1/4 and 3/8 is 4.5cm; the height of 1/2 and 5/8 is 5 cm; the height of 3/4 and 7/8 is5.5cm Product feature: Easy Connection: Used to expand copper pipe, expand copper pipe and - easy to connect. Note: When installing the air conditioner, it is necessary to install the pipe expander on the electric hand drill and unfold the copper pipes so that the two copper pipes can communicate with each other. High quality materials: This tube hose expander kit is made of high quality steel, which is wear-resistant, not easy to deform and durable.