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CLA-A is an industrially fabricated product designed for excellent sound attenuation and ease of installation. The sound attenuator is the part of the air ventilation system whose only purpose is to reduce sound. This specific product variant can be used in circular ducts. It consists of steel, insulation material and some minor polymer. The expected lifetime of the product is 25 years. Please visit https://www.swegon.com/products-and-services/air-distribution/silencers/circular-silencers/cla-a/ for more information.