1. tube benders, tools for refrigeration and air conditioning 2. for tube 1/4, 5/16, ... , 3/4, 7/8 inch (6~22mm) tube benders, tools for refrigeration and air conditioningincludes CT-999R, CT-312, CT-209, for ... feel free to contact us for more information. Tube Benders, tools kit, for refrigeration and air conditioning systems