Zoom Quick Comfort 6061-T6 Stems are adjustable from 80-150 degrees. FEATURES: 6061-T6 stem Adjustable-angle 85mm range from minimum insertion to max insertion; 125mm from minimum insertion to top of quill SPECS: Material: Aluminum Color: Silver S.H.I.S. Stem Clamp Diameter: 25.4-24tpi Quill Bar Clamp Diameter (mm): 25.4 Stem Angle (deg): 80-150