Our copper tubes, available in both smooth and inner grooved options, are engineered for optimal heat transfer and reliability under high pressure. Smooth tubes range from 5 mm to 10 mm diameter, while inner grooved tubes offer diameters from 4.76 mm to 22.2 mm. Both types are designed to meet the stringent demands of HVAC and refrigeration systems. Our products comply with international standards (ASTM, JIS, EN, IS, GB/T) for quality assurance.