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Rockwool pipe with aluminum foil facing is a type of pipe that is commonly used in the construction industry. It is made from a combination of rockwool and aluminum foil, which provides it with excellent insulation properties. The aluminum foil facing is used to protect the rockwool from damage and to provide a smooth surface for painting or other types of finishes. The pipe is typically used in applications where high temperatures are involved, such as in the HVAC industry.