Cane Creek 40-Series ZS44 / EC44 Short Cover Bike Bicycle Headset Tapered Black
1.5" Cap - EC44. 1 1/8" Cap - ZS44. The upper bearing shell is semi-integrated (ZS), while the lower is external (EC). Cane Creek 40-Series ZS44/28.6 - EC44/40 Tapered Headset. Model: 40-Series Headset Tapered (ZS44/28.6 - EC44/40).