AF1000 to AF5000 Air Filter SMC Standard Air Filter AF1000 to AF5000, Port size M5 to 1″ On Click the picture to enlarge: Model:AF1000 AF2000 AF3000 AF4000 AF5000 Precision Regulator IR Series AC1000 to AC5000 F.R.L AC1010 to AC5010 F.R.L AC1020 to AC5020 F.R.L