FSA Pig DH-Pro headset, alum/std, 1-1/8" sil Bearing Type: Cartridge/Angular ContactCrown Race: 30.0Headset Detail Color: SilverHeadset Size: 1-1/8"Headset Type: 1-1/8" Standard CupsMaterial: Al/CrMoStack: 31.0mmStack Height: 31mmSteer Tube Size: 1-1/8" ThreadlessWeight: 176g