PneumaticPlus offers quality Air Preparation Units for various pneumatic applications. PPR Series Regulators offer stable air flow with locking adjustment knob to prevent accidental setting changes. PPR Modular Series Regulators can connect to PPF Modular Series Air Filters & PPL Modular Series Air Lubricators using our brackets to form a fully functional FRL unit. PPF Series Filters and PPL Series Lubricators are available on Amazon.com for purchase along with other PneumaticPlus Air Preparation Units.