The Ritchey Logic headset is constructed of steel and is available in silver or black.5/32" ball bearings in upper race to reduce weight, 3/16" bearings in lower race for durabilityItem SpecificationsColorSilver/BlackWeight140gMaterialSteelSteerer Tube1-1/8" ThreadedCrown Race30.0Stack Height33mmBearing Type1/8" -3/16" BallHeadset Type1-1/8" Standard CupsDefined ColorSilverS.H.I.S UpperEC34S.H.I.S LowerEC34S.H.I.S. Clamp Diameter28.6-26tpi