Typical line sets available for a mini-split system consist of 2 copper line sets in different diameters. The small one is for your refrigerant and the large one is for the evacuation of the vapor. The have flared ends. It’s a high quality copper and all are insulated with 3/8” pipe insulation.
With every line set you buy from http://www.younits.com a 4 wire, 14 gage control cable will be included. The line set is available is 15, 25 and 50 foot lengths to complete your project.
Go to http://www.younits.com to find products for your line set needs.[youtube=http://www.youtube.com/watch?v=DbvQkAmSi9Y&feature=plcp&context=C4da29d0VDvjVQa1PpcFPXlLd2tsbiqfJNR3zh1_WawVPfpWoMG50%3D]