Inner Grooved Coil is widely use for the Air Conditioner, the Assembly Type Air Conditioning Unit, the Residential Central Air Conditioning, Show Case Refrigerator which is in conformance with the developing tendency of the Air Conditioner and Refrigerator to the high efficiency, the energy saving, the environment-friendly and the healthy.

The even and compact structure, the highly precise dimension, the normative and integrity groove shape, the low interior surface residuum etc., the inside surface area increases 65~100% than that of the same specification of plain copper tube, the heat transfer coefficient is about 1.8~2.0 times of that of same specification of plain tube.

Outside Diameter: From 3/16 inch to 3/8 inch (British system), or from 4mm to 9.52mm (Metric system)
Wall Thickness: From 0.008inch to 0.018 inch (British system), or from 0.20mm to 0.46mm (Metric system)

These coils are supplied in the soft annealed form.