AstroCel I HT-750 filters are used in applications that require high levels of contamination control at operating temperatures of up to 750°F (399°C). The filter consists of water-proofed, fire-retardant fiberglass media formed into a series of pleats. Corrugated sheets of aluminum separate the pleats to permit maximum usage at minimum resistance. A filter frame made of stainless steel encloses the media, which is sealed to the frame sides with a black cement bond. Gasketing is available on the upstream, downstream or both faces.