These are Severely Hydrotreated Naphthenic base oils used in the formulations of Metal Working fluids for a large variety of operations. These oils are having low poly nuclear aromatic hydrocarbons (PAHs). These Napthenic oils are more polar in nature than Paraffinic oils and hence they have greater affinity to metal, good cooling properties and execellent low temprature properties. They also have better solubility and ability to form stable emulsions.