The 1.900" CPLG RSTR INSUL ONE END ASTM F1948 CAT 1 from Dresser Industries is a coupling designed for insulated piping systems. This product features a size of 1.900 inches and is compliant with ASTM F1948 standards, ensuring high-quality performance and safety. The insulation on one end provides enhanced thermal protection, making it suitable for various applications, including HVAC and refrigeration. This coupling is made from durable materials, ensuring longevity and reliability in demanding environments. Its design allows for easy installation and secure connections, making it a trusted choice for contractors.