What does the "integrity" attribute of equipment mean?

When selecting equipment for my ship, I note that items have a value listed for "integrity", usually either A or B.

See, for example, that this mining laser has an integrity value of A:

enter image description here

What does this value mean? What effect does it have in the game?

elite-dangerous

Pictures about "What does the "integrity" attribute of equipment mean?"

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.