The 0.840 CPLG .156X3-1/2 AP27 A/C coupling by Dresser Industries is specifically designed for air conditioning systems. With a diameter of 0.840 inches and a length of 3.5 inches, this coupling is perfect for tight installations. Made from durable materials, it ensures a long-lasting connection that resists wear and tear. This coupling is compatible with various A/C systems, providing a reliable solution for fluid transfer. Its lightweight design allows for easy installation and maintenance, making it a preferred choice for HVAC professionals.