30.5 x 41.8 x 8 mm 45 / 45 Sealed Headset Bearing.
EMSea MH-P08F Bicycle Headset Bearing 30.5 x 41.8 x 8 mm TH870E Bearing MR121
FSA MR121 TH870E 1-1/8 30.5 41.8 45 / 45 Campy Campag Headset Bearing
MR121 | Headset Bearing | By FSA | AKA: TH870E
FSA Orbit C No.8 1-1/8" Internal Headset 42mm Bearing Fit MR121 Campy Bearings
FSA Headset Bearing Kit Pair No.42 Orbit C-40 C40 ACB-CX TH870E TH073
