Streamline® Standard and Mini-split Line Sets are available with Duraguard UV™ (Coated Elastomeric) insulation. This high-quality insulation’s durable polymeric jacket is designed to handle the toughest solar and weather conditions. Every Streamline® Line Set meets our rigorous standards for quality and consistency – made and assembled in the USA, UL Recognized to 700 PSI, compliant with ASTM B1003, and covered by a 10 year warranty.