What is the difference between oxygen free copper tube and copper tube

The difference between oxygen free copper tube and copper tube:

Oxygen free copper tubes have high purity and are usually smelted in a vacuum state. They have very high purity and are generally used in precision instruments;

Copper pipes with a copper content of over 90% are considered copper pipes, and there are also standard ones such as H90H95. Ordinary copper pipes are commonly used in various places, including civilian and ordinary heat dissipation applications.