The Cult Salvation Stem is made of CNC machined 6051 aluminum. Reach: 52mmStack Height: 29.2mmRise: 31.8mm (upright)/2.6mm drop (invert)Clamp Bolts: 8x1.25mm Hollow (4x)Pinch Bolts: 8x1.25mm (2x)Weight: 10.6oz