Prusa lubricant applicator set (5g)
Universal lubricant with applicator for printer maintenance.
Your printer should be after a certain period of time (see the 3D Printing Handbook) cleaned and greased in order to work properly. More information including pictures is in the online service manual. No need to apply this lubricant during the first assembly of the kit, all parts are greased by the manufacturer.
Great I don't know anything better, a bit expensive but worth buying