Vintage Diamondback high rise/ dirt drop stem with cable stop and brass roller. Stem extension is approx. 130mm at 90 degree angle with approx. 170 mm total length following the angle of the stem extension. Bar clamp is 25.4 and the clamp has the cutouts for drop bars. For reference, this stem is a little longer and at a shallower angle as compared to a salsa P10 dirt drop.  Quill is 22.2mm/ 1".