The SAAF™ Cassette Heavy Duty is a top-tier 3? V-bank, 12?-deep gas filtration cassette, recognized as the best in its class for industrial and commercial applications. Designed and manufactured by AAF Flanders under strict ISO 9001:2000 quality standards, this cassette features a patented design (US 7,588,629 B2) that ensures superior form and fit, even in older cassette holding systems. Its enhanced media utilization and no-glue construction eliminate common issues such as spills, off-gassing, bypass, and leaks, delivering consistent, reliable performance. The UL Classified filled cassettes provide high-quality filtration, making them the ideal choice for critical environments requiring robust gas filtration.