International Specialty Engineered Lubricants is a leading independent manufacturer of refrigeration and specialty lubricants. We formulate, blend and package lubricants at our state-of-the-art manufacturing facility in Jacksonville, Florida. The NXT lubricant products are manufactured by Isel. We are driven to provide customers with the most advanced fluids at the best value, all supported by unmatched customer service. It’s why companies around the globe trust us to deliver the refrigeration lubricants they depend on every day.