Amazon.com : BQSHOP 1-1/8" Heavy Duty Headset Top Cap Bearings, 34mm / 44mm Diameter Threadless Stem Tapered Sealed BMX Bearing Nuts for Mountain MTB Bike (34MM) : Sports & Outdoors
Amazon.com : CYDZSW 1-1/8'' Threadless Bike Headset for Bikes Fork,with Spacers Star Nut Stem Cap and Bearings,MTB Mountain Race Bicycle BMX Scooter Headset Parts 34mm : Sports & Outdoors