DiversiTech® Line Sets are individually packaged in sturdy corrugated cardboard, designed and tested for individual parcel shipment. Line Sets are designed for air conditioning and refrigeration systems. The copper tube is refrigeration grade tubing to ASTM B280. The suction line is pre-insulated with Armaflex AP pipe insulation. This insulation is a black flexible elastomeric thermal insulation. The expanded closed-cell structure makes it an efficient insulation. It is manufactured without the use of CFC's, HFC's or HCFC's. AP Armaflex contains Microban® antimicrobial product protection for added defense against mold on the insulation. DiversiTech® Min-Split Line Sets are similar to Standard Line Sets but come with additional insulation on the liquid line and flared line ends. Copper tubing complies with ASTM B280 for Seamless Copper Tube for ACR.