ScorpionÂ® TMA Truck Mounted Attenuator. The Scorpion line of Impact Attenuators, by TrafFix Devices, Inc., are truly different by design. The Scorpion TMA consists of strut and cartridge sections that are linked together on a support frame.
Any questions you can e mail me through my avatar. The metal used between tile and carpet is called a Z bar. It is a hidden metal that is put under the wood tack strip and the carpet is tucked in to it. The result is a hidden metal and the carpet looks as if it were tucked tight to the carpet. Transition strip.
If the idea of a marble strip doesn't appeal, I wonder if it would be possible to use quarter-round sections of tile that matches your subway tiles. I'm not sure what you call the quarter-round sections, but you sometimes see them as the edging on tile wainscot that stands proud of the wall.