These Precision Bearings are made of Case Hardened Carbon Steel.
CYSKY 31.8 Bike Stem 45mm Mountain Bike Stem Short MTB Stem Bike Handlebar Stem for Most Bicycle BMX MTB Road Bike (Green)
FOMTOR 25.4 stem 35 Degree Bike Handlebar Stem Riser MTB Stem 60mm 90mm 110mm for 1" handlebar Mountain Bike Road Bike BMX MTB (31.8X70mm)
PLATTBK 31.8 MTB Bike Handlebar Stem Riser Aluminium Alloy Short Bicycle Handlebar Stem 0 Degree 45 mm for Mountain Bike, Road Bike, BMX, MTB
Wake High-Strength 31.8mm Aluminum Alloy Mountain MTB Bike Stem Riser 45mm Short handlebar Stem for Most Bicycle, Road bike, BMX, MTB DownHill (Black)
JUPSK 31.8mm Bike Stem, Cycling Bike Stem Short Handlebar Stem Lightweight MTB Stem for Most Bicycle Road Bike BMX MTB
CYSKY 31.8 Bike Stem 45mm Mountain Bike Stem Short MTB Stem Bike Handlebar Stem for Most Bicycle BMX MTB Road Bike (Black)
