Pretty self-explanatory; it’s a syringe with Mobilux EP2. I used it for my LDO Voron 2.4 build and it worked fine with the included nozzle.
One suggestion I have is if the nozzle was a cone shaped plastic that tapered. That way I would have been able to “pressurize” the linear rail and force the EP2 to squeeze out the bearings. I just used a paper towel and tried to seal it as best I could.