254MM FILTER GRILL ASA61 GRAY Create your own filter fans or exhaust grills Mounts easily with 4 screws using template and hardware provided. Designed to meet IP5X dust resistance. Complete with flame retardant ABS plastic grill and flame retardant synthetic filter. Integral EVA foam gasket on the reverse side of grill seals against the mounting surface. Hole cutout is NOT critical as the rear of the filter grill seals to the surface (see rear photo below) Can be used with standard 3.15" or 4.7" square fans or alone as an exhaust grill Moulded in a choice of four colors to match our racks & accessories. "BK" (Black) "CG" (Gray/Beige - RAL7032) "GY" (ANSI 61 Gray) "LG" (Light Gray - RAL7035)