FSA Orbit 1.5" ZS Internal Threadless Headset

• Dual seal, angular contact bearings provide long lasting, smooth rolling performance
• Forged and CNC machined 6061 T6 alloy cups
• 44mm Upper / 56mm Lower
• S.H.I.S.: ZS44/28.6|ZS56/40
• Fits 1.5" Tapered Steerer tubes
• Stack: 10mm/3mm
• Color: black
• Weight: 139g