One knife use is 2 bearings, so need 2 pieces to assemble into a knife.
FLIPPER folding knife quick-opening bearings:
Black nylon gasket set off by the 10 1.588 diameter ceramic beads made of,
Is used to compare the high-end titanium folding knife and some other high-end folding knife use.
The size is as follows
Outer diameter: 11.8MM
If you need to install or replace the bearings, then you need to disassemble your tool to measure whether the outer diameter and inner diameter of the hole to install.
PS: This bearing can not be installed if your folding knife does not come with the unit bearing position.