Liquid Bearings, Large 2 oz bottles of the TOP QUALITY 100%-synthetic oil for sewing machines and sergers, makes them quieter and smoother, eliminates the stalling and humming! Immediately begins to displace old petro-oils and lubricant sprays Completely cures slow-speed stalling and humming on your machine! Never becomes gummy like petro-oils do, wont attract dirt Thread breakage and tensioning problems vanish with proper lubrication Comes with standard  AND long 1-1/2 twist-on/off needles