Upgrade your HVAC installation with the Intertherm Pre Charged Quick Connect Line Set. This 40-foot line set features a durable 3/4-inch and 3/8-inch diameter, designed for efficient refrigerant flow. Pre-charged for convenience, it eliminates the need for additional refrigerant during installation, saving you time and effort. The quick connect feature ensures a hassle-free setup, making it perfect for both DIY enthusiasts and professionals. With its robust construction, this line set is built to withstand the rigors of any climate, ensuring reliable performance for your cooling system.