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/BlackWeight130gMaterialSteelSteerer Tube1" ThreadedCrown Race26.4Stack Height33mmBearing Type1/8" -3/16" BallHeadset Type1" Standard CupsDefined ColorSilverS.H.I.S UpperEC30S.H.I.S LowerEC30,26S.H.I.S. Clamp Diameter25.4-24tpi