Anycubic Vyper Leveling - component for forked light barrier

There are two forked light barriers on the gantries for the Z axis. Once on the left and once on the right. On the outer side of each is a small grub screw with a hexagon socket. If you turn it carefully, the long lever moves up or down. This allows fine adjustment of the Z-axis. 

Sometimes you can not adjust further because pin is too long. Here you can find a shorter version. You can find different lengths. The adjustment is very sensitive.

The original length of the pin is 26.2mm