Mueller Streamline Refrigerator Copper Tubing - 99% pure copper. Annealed for ready bending. O.D. measurements apply to refrigerator tubing. Mueller Industries dehydrated refrigeration coils are made to ASTM standard B-280. The copper tube is cleaned, nitrogen urged, capped (with standard yellow caps) and shrink-wrapped to an air tight seal. - Size: 3/4 In. OD x 50 Ft., Type: Refrigeration, Pkg Qty: 1, Package Type: Box