Physics properties on many colliders at once? (Same GameObject)

I was wondering if there was a way to add a physics material to multiple colliders at the same time within the same game object.

When I imported my map to Unity with Tiled2Unity, I used the collider component, but it added tons of edge colliders to the one GameObject as a parent to the map mesh renderer object. Can I do this quickly without adding "Slippery" to all of them one by one?

Thanks