In smaller sizes it can represent a midge or a trico mayfly and in large sizes it imitates any dark colored mayfly and small crickets, but no matter what it looks like it often works. Per 3. Sizes: 12, 14, 16, 18.
These things are great.I was fishing the big flatbrook and I was drifting nymphs along and there where about 5 other people there and noby was caching anything and I'm only 10 years old and I was tring to cross but I could't because the water is like 3 feet and 9 inches and I have never been in fast water but a guy said to go down into the rapids because it is shallow and I didn't have felt soles and I almost fell in and when I got acros there was a mini hatch and I caught two nice brookies with the blach knat but them I relized the creel was with my dad and he didn't have waders so he had to drive back to a brigeand walk a mile so I put the trout in the back of my vest and put it on the groud and when I was in the water the trout went balistic and my vest started floping and all eyes went on me and my vest but it was stilla good trip witha good fly.sorry about the spelling.
Cabela's Black Gnat Dry Flies are some of the best Black Gnat flies that I have used. The Brookies in Wyoming just love them. They are long lasting and well tied. I caught may fish on the Black Gnat and the with stood the teeth of those mountain Brookies. I will definetly buy more before my next trip and would recommend them to anyone fishing for Brookies.