PneumaticPlus offers quality Air Preparation Units for various pneumatic applications. SAR Series Regulators offer stable air flow with a locking adjustment knob to prevent accidental setting changes. SAR Modular Series Regulators can connect to SAF/SAFM/SAFD Series Air Filters and SAL Series Air Lubricators using our Modular Spacer brackets to form a fully functional FRL unit. Please visit our Amazon Store for our complete line of air filtration products.