Parkside compressed air maintenance unit, pressure regulator 3 in 1: pressure regulation, compressed air treatment and lubrication : Amazon.co.uk: DIY & Tools
Parker 07B44A18A4BDC Three-Unit Combo Compressed Air Filter/Regulator/ Lubricator, 3/4" NPT, Metal Bowl with Sight Gauge, Manual Drain, 40 Micron, 90 scfm, Relieving Type, 2-125 psi Pressure Range, Gauge: Compressed Air Combination Filters Regulators
Amazon.com: Filter Regulator and Lubricator – 3 in 1 FRL Unit - 3/8" NPT – 150 PSI (Campbell Hausfeld PA208103AV) : Industrial & Scientific