Um yea... I actually don't know if this is a flush device or not, but it seems as though that's what it is. I didn't get very much info on this when I built it, but I think it's a pretty interesting shape and a great shader. This shader uses the bumpCombiner shader by Francesa Luce with a procedural grid in it. You can get that shader from HighEnd3d.  The grippy texture is created using this shader, the base shader color and surface quality is achieved with a DGS node.