Good quality air conditioner copper tube pancake coil Annealed Seamless Copper Tubes for Air-Conditioning and Refrigerat Ancake coiled copper tubes are widely used in the installation of air conditioning and refrigeration systems. Produced in the following size ranges: Min. Diameter: 3/16" (4.76mm) Max. Diameter: 7/8" (22.23mm) Lengths: Standard available lengths are 15m, 30m, 50FT Material - Cu-DHP (UNS No. C12200 Specification ASTM B 280 / EN 12735-1 and all relevant international standards Temper soft annealed, special tempers on request Cleanliness - all annealed coils meet or exceed the cleanliness levels