Keeps parts functioning properly adding life to your printer. No need for early fuser oil replacement thanks to its extended page yield of 500, 000 feet for model 3835 & 800, 000 feet for model 3900. Increased productivity by reducing paper jams. OEM quality for proven quality & peak performance. Contains: Fuser Oil; Page-Yield: N/A; Device Types: N/A; Supply Type: N/A.