Brackett Aero Filters BA-4 Filter Element Assembly - No Frame Required

This Brackett polyurethane air filter element has been designed to provide maximum dust collecting efficiency, non-restrictive airflow, and economical element replacement, while maintaining a lightweight filter. The element has been treated with a special treatment called a wetted agent and is approximately 98% efficient. The special wetted agent is the secret to efficiency of capturing dust. In addition, the element has received a fire retardant treatment. For the above reasons, replace the element each 200 hours of use, 12 months or when 50% covered with foreign material. DO NOT WASH AND REUSE.