FSA 1/DX PRO (I/E)

I believe this is the FSA 1/DX PRO (I/E) headset for 1.5 to 1 1/8 tapered head tubes. Dunbar Cycles has this listed as a FSA Gravity 1 ZS49/EC49 Headset. I bought this on sale hoping it would fit my bike, but it won't. I believe I need a more integrated headset? I'm really not sure, so it's up for sale. Brand new, never been installed. No box included, but the pieces will come all zip-tied together. If you have any questions feel free to ask.