This product needs some explanation.
These are 3 different types of adapters, made for people who feel pain in their finger after spraying big surfaces. The adapter gives a different grip to your cap (1 for round caps like fatcaps, 1 for NY fatcaps and 1 for banana caps/skinny caps), taking away the pain. It also takes away a lot of the overspray from your finger, making sure you walk away with clean hands.
The adapter is washable and can be cleaned for re-using by just pinching it, the paint will fall off then.