Strong PowerTube Expander Tool Parts Drill Steel Bit Expansion ToolOOTDTYfeatures: ● 5-piece connection: can meet your different size requirements● Easy to install: very suitable for installers, whether you are just learning or already doing● Feature: can be used for old or broken.● High-quality materials: made of carbon steel. It has high and uniform hardness and wear resistance and high flexibility limit● Note: when installing the air conditioner, expand the steel pipe to make two steel pipes togetherSpecification: Material: carbon steelColor: BlackSpecifications: 1/4", 5/16", 3/8", 1/2", 5/8", 3/4"; Expanding Tube Diameter (mm): 6mm, 10mm, 12mm, 16mm, 19mm Package Includes: 5x Electric Tube ExpanderNote: 1. Please allow 1-2mm errors due to manual measurement, please make sure you do not mind before ordering.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.