When you're looking to hook up your 18K MrCool, 5th generation, DIY indoor and outdoor units, the big factor you need to take into account is the distance from your air handler to your condenser. For short lengths and nearby installations, the 1/4 in. x 1/2 in. MrCool DIY Ductless Split System Line Set - 16 ft. - R454B is the perfect fit to get your system up and running. With a 1/4 in. liquid line size, 1/2 in. suction line size, this MrCool Line Set comes coiled for easy transportation and handling. The MrCool DIY System allows for fully do it yourself installation, the instructions outlining an easy step-by-step guide to ensure your R454B refrigerant is safely hooked up without any leaks. In a white color that matches the aesthetic of your MrCool DIY system, what more could you be looking for from your quick-connection MrCool Line Set. Secure this 1/4 in. x 1/2 in. MrCool DIY Ductless Split System Line Set - 16 ft. - R454B today and give yourself the ease of installation that you've been hoping for. (This Line Set is Not for Use with the 4Th Generation, R410A Refrigerant, Mini Split Heat Pump Systems).