AST-II 29A99L2T3G3 457x457x117mm Size: 457Wx457Hx117D MM Frame: Aluminium Media: Fibreglass Gasket: PU, Bothside Faceguard: Bothside Pressure Drop: 65 PA Filter Class: H13 Filter Airflow: 338 CMH Efficiency: ≥99.95% @ MPPS