A laminar flow hood, also known as a laminar flow cabinet or clean bench, is a piece of laboratory equipment used to provide a sterile work environment, typically for tasks such as cell culture, microbiology, and other applications requiring a controlled, particle-free environment.

The Telstar BIO II A is a specific model of laminar flow hood manufactured by Telstar, a company specializing in clean air and containment technology for the pharmaceutical, healthcare, and laboratory sectors. The BIO II A is designed to provide Class II Type A2 biological safety, which means it offers personnel, product, and environmental protection. These hoods typically feature HEPA (High Efficiency Particulate Air) filters to remove airborne contaminants and create a laminar flow of clean air across the work surface, protecting sensitive samples or experiments from contamination.