The 5DEV Aluminum 2-Bolt Stem is clean, strong, easy. Their Variable Radius Geometry (VRTS) 2-bolt clamp makes installs fast and fuss-free, with secure hold and a sleek profile for modern cockpits. Precision-machined in San Diego from premium 7075 aluminum for balanced stiffness, low weight, and daily durability. These stems include black shims that allow use with 31.8mm bars. VRTS 2-bolt clamp makes installs fast and fuss-free, with secure hold and a sleek profile for modern cockpits Precision-machined in San Diego from premium 7075 aluminum for balanced stiffness, low weight, and daily durability 37mm stack height Includes black shims to allow compatibility with 31.8 bars Item Specifications Bar Clamp Diameter (mm) 31.8 Bar Clamp Diameter (mm) 35.0 Color Black Defined Color Black Length 40 Material Aluminum S.H.I.S. Stem Clamp Diameter 28.6 Stack Height 37 Steerer Clamp Diameter 1-1/8" Stem Angle (deg) 0 Stem Type Front Load Weight 144 5DEV Aluminum 2-Bolt Stem Stems UPC: 850058721774