61420500C - 3/8" x 7/8" x 1/2" Duraguard UV Line Set - 50 FtSpecification Sheet Mueller Streamline 61420500C 3 8" x 7 8" x 1 2" Duraguard UV Line Set 50 Ft Streamline Standard and Mini split Line Sets are available with Duraguard UV (Coated Elastomeric) insulation. This high quality insulations 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