"If you're preparing to install your 24K & 36K MrCool, 5th generation, DIY indoor and outdoor units and want to ensure the process is straightforward, one factor to keep in mind is the distance between the units. When reaching for a room further away or on an upper floor, the 3/8"" x 5/8"" MrCool DIY Ductless Split System Line Set with Control Wire - 35 Feet - R454B offers an ideal solution. Featuring a 3/8"" liquid line size, a 5/8"" suction line size, and a total length of 35 feet, this MrCool Line Set comes coiled to make transportation and maneuvering during installation a breeze. Crafted to allow for do-it-yourself setup, the MrCool DIY system includes detailed guidelines to walk you through connecting and testing the R454B refrigerant line, ensuring a leak-free setup. With a stylish white finish that matches the MrCool DIY system, this quick-connection Line Set guarantees a seamless setup experience. Choose this 3/8"" x 5/8"" MrCool DIY Ductless Split System Line Set with Control Wire - 35 Feet - R454B today and enjoy your new HVAC system as quickly as possible. (THIS LINE SET IS NOT FOR USE WITH THE 4TH GENERATION, R410A REFRIGERANT, MINI SPLIT HEAT PUMP SYSTEMS)"