General description The CSPARKV Copper Pipe Tube Expander is a hand expanding tool designed for air conditioner repair and pipeline maintenance. It is suitable for expanding copper pipes with sizes ranging from 6mm to 22mm. Technical specifications Size of expanded tubes: 6/8/10/12/16/19/22 mm (1/4" 5/16" 3/8" 1/2" 5/8" 3/4" 7/8") Material: Alloy steel construction Usage Ideal for copper pipe expansion Perfect for air conditioning maintenance and pipeline maintenance Other information Features a human body engineering design for ease of use Includes a built-in strong return spring for effortless operation