Specifications

1,size:1/4"*6/7/9/11
2,material:chrome steel
3,grade:G100
4,hardness:63-66hrc

1/4" Series steel ball retainer with chrome steel ball

size	1/4“×6
size	1/4”×7 for front and rear hub
size	1/4”×9 for BB cups
size	1/4“×11 for rear coaster brake

 

 

7/32" Series steel ball retainer with chrome steel ball

size	7/32" × 8
size	7/32" × 10

 

 3/16" Series steel ball retainer with chrome steel ball

 

size	3/16" × 7  for front and rear brake
size	3/16" × 9

 

5/32" Series steel ball retainer with chrome steel ball

 

size	5/32" ×16 for head parts(fork fittings)

 

5/16" Series steel ball retainer with chrome steel ball

size           5/16" × 7  for opc BB cups

size             5/16" × 9 for opc BB cups

5/16" ×  9 for opc BB cups