AW1000 to AW5000 Air Filter & Regulator SMC Standard AW1000 to AW5000 Air Filter & Regulator, size: M5 to 1 On Click the picture to enlarge: Model:AW1000 AW2000 AW4000 AW5000 Precision Regulator IR Series AC1000 to AC5000 F.R.L AC1010 to AC5010 F.R.L AC1020 to AC5020 F.R.L