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The Mueller 35' Insulated Line Set is a high-quality refrigerant line set designed for HVAC and refrigeration systems. Made of copper with an insulation thickness of 3/8", this product features a 3/8" liquid line diameter and 5/8" suction line diameter. With an item length of 35', this line set is perfect for use with Friedrich 30k units and offers reliable performance for your refrigeration needs. Made in the United States by Mueller, this line set is a trusted choice for businesses and industrial applications.