Brand: BLOOKE Name: Bike Headset Bearing: 2 bearingMaterial: Aluminum alloy + bearing Color : black, red, gold, blue Specification: 34mm Weight:113.7g Structure: Semi-concealed fully sealed bearing Features: Anode process For caliber: Upper inner diameter 34MMLower inner diameter 34MM For front fork: Standard straight pipethreadless upper 28 .6mm/ lower 30mm How to choose it? 1:Provide your bicycle frame brand,model and other information. 2: Measure the inner diameter of the frame and the outer diameter of the front fork. Product Schematic 1. Dust Plug 2. Top Cover Screw 3. Top Cover 4. Steel Hanging Core 5. Pressure Ring 6. Pressure Ring 7. Up Bearing 8. Up Headset 9. Down Headset 10. Down Bearing 11. Open Bottom Gear Product Features 1.Double Bearing Design 2.Up/Down Headset 34mm 3.Bottom Opening Design 4.Anode Process Headset Tool Display Installation and Removal