The FSA Headset No.42 is a replacement headset ...
for certain Specialized mountain bikes and electric mountain bikes. Includes: top cover, washer, compression ring, upper bearing (1-1/8"), lower bearing (1.5"), and crown race.
The PI-1 Alloy 45×45 headset has an aluminum ...
top cap, upper bearing cover, lower race and upper and lower cups. All-aluminum construction results in a lightweight headset. Each headset is fitted with super-smooth rolling, precision, 45×45 angular-contact sealed bearings.