But because of cost, its use is probably on the decline.
Copper tubing is available in straight lengths and by the roll.
Most copper tubing used in residential plumbing will be straight runs of type M or type L, such as these samples. Type-L rolled tubing is softer. Wall thickness, which in turn affects the inside diameter, the water-carrying capacity and the rated internal working pressure. Type L, the next heaviest, has an inside diameter of 0.545 in. and a wall thickness of 0.40 in. Type K, the heaviest of the three, has an inside diameter of 0.527 in. and a wall thickness of 0.049 in.