Primary High Temperature Air Filter Stainless Steel G4 Panel Filter Product Description Metal Mesh air filters offer a semi-permanent, cleanable air filtration solution, suited for outdoor environments. Metal Mesh filters are ideal for use in harsh environments where rugged, washable and reusable filters are most appropriate. Features Frame - Stainless steel The optional frame thickness ranges from 21 to 46mm Reinforcement - Hot-dip galvanized square steel wire mesh Technical