Super low viscosity oil to run bearings the fastest, regardless of materials, ceramic or stainless steel, and shape in needle or ball bearings. Balanced between low viscosity and enough protection. Good for ball bearings, metal bearings, shafts and etc. Applicable to spool bearings, knob ball bearings, spool shafts and etc. Viscosity 5, Penetration 8, Protection 1, Anti-rust 2, Durability 3, 15ml