Is it possible to convert a Collider into a Spawner?

Hi, I'm writing my own spawner right now and I'm just wondering if there's any way to use the dimensions of a box collider for example to set up the max and min spawn positions instead of manually setting them up? It's a minor thing, but just out of curiosity I'd like to know, because I know there are functions that return dimensions/position of objects. I'm asking this because it would be so much easier to configure boundaries for things like spawning random kinematic obstacles on the players path.

Sticking to random.range and vector3's is fine and all, but having a visual rescale-able zone is more practical.