Aluminum

I got this stem with a bulk lot of bike components, some used and some new old stock. I don't know which this is, it's very clean and doesn't have the usual signs of normal wear, but didn't come with any packaging and has some small scratches from being in a box of other parts. Listed as used just to be safe, but may have never been mounted on a bike :) 90mm length 31.8mm clamp 1-1/8" steerer clamp Feel free to ask any additional questions via message.

I got this stem with a bulk lot of bike components, some used and some new old stock. I don't know which this is, it's very clean and doesn't have the usual signs of normal wear, but didn't come with any packaging and has some small scratches from being in a box of other parts. Listed as used just to be safe, but may have never been mounted on a bike :) 90mm length 31.8mm clamp 1-1/8" steerer clamp Feel free to ask any additional questions via message.