The FSA OS-190 Stem is 3-D forged and then CNC machined from AL6061-T6 aluminum. It has Chromoly hardware with a 4-bolt cold-forged AL6061-T6 front clamp.
Have this on my Rockhopper. Light trail and a lot of street, some jumping. Always feels solid, looks great, and price is right on. A good value.
Solid Stem at a fantastic price. Super strong, no problems whatsoever. Mated well with my FSA headset. I recommend it!