Low viscosity oil for both bait casting and spinning reels, to remove frictions from working components to make them with the light handle turn. Nano-sized diamond particles are combined to achieve both the stable low viscosity and protection performances. Recommended especially for tuned reels with tuning spools and low tolerance ball bearing like ABEC5, ABEC7, and ceramic bearings. With this oil, bearings will have more ball running noise than regular oil. No saltwater use. 7ml