SPECIFICATIONS:
Material: top bearing steel
Size: outer diameter(inner diameter)
41mm(30mm)/41.8mm(30mm)/47mm(34.5mm)/49mm(38mm)/51mm(40mm)/52 mm(41mm)
For : Mountain Bike
Use: General headset bearing repair parts

PACKAGE CONTENTS:
1 x Bike Headset Bearing
Note: unable to repair the old loose bead or ball (bearing) headset