VR Threadless Aluminum 6061-T6 Stem 4 Bolt Diameter 25.4mm Length 60mm 7 Degree Threadless 4 bolt 60mm 7 degree stem Aluminum 6061-T6, 3D forged Clamp diameter 25.4mm, S.H.I.S. clamp diameter 28.6mm Length 60mm, height 40mm Weight 150g