MagiDeal 1-1/8 - Black The headset fits bikes/frames with traditional 1 1/8 Durable,smooth,light-weight,long-lasting headset,representing the perfect balance of performance,durability and value. Complete with star nut and cap bolt. Application:Mountain Terrain Bicycle (MTB),Bicycle Motocross (BMX),Road Bike,Fixed Gear etc. Material:Aluminum & Iron