Cartridge Bearing Type- Lightweight and strong duraluminum alloy construction- Tange Seiki original sized 4T5 Cartridge Bearing- Fully Sealed Mechanism- For 1"1/8 steerer fork - For head tube ID: 34mm- Cups: 34mm- Crown race: 30mm (inner diameter)- Stack height 13.8+11.5=25.3mm- Weight: 112g (includeing top cap and starnut)- Color: Silver (as pic. shown)-OEM package (This item is exactly as pictured and does not include retail package)Content: 1 set (With top cap and starnut) / pack