The Copper Midge is spin off the standard black and silver Zebra midge. Putting something a little different in your fly box. 
Tied on a Gamakatsu size RS- 14 hook
(appears to be more like a size 16)
MFC tungsten beads 3.3mm 
Perfect for nymphing Brown Trout, Brooke Trout, Rainbow Trout and even Steelhead. 
Run it as a single nymph, run it on the tag end off your heavier anchor fly, or even use this as the anchor fly. 
However you rig it, know it is well crafted and offering the fish something slightly different then they have seen.