550mm MGN12 Linear Motion Rail Guide with MGN12H Carriage Block for 3D Printer and CNC Machine
Please remove the ties or the stoppers on the ends of the rail before
installing it to the machine, and don't let the block falls from the rail.
Packing list: 1  550mm MGN12 linear rail with MGN12H block2  Ball (for
backup)
 
Product Features
  

         
Made of bearing steel, with good rigidity
         
There are 2 ties or rubber stoppers to keep the block on the rail in case the block falls from the rail
         
Threaded holes of the block: 4-M3*3.5; center distance of the holes: 20*20mm
         
It is suggested to use T nut M3 if you fix it to 20 series EU Al-profile
         
Come with 2 spare balls in the package for backup