Fully Automatic Air Regulator Filter For Lubricant (FRL), Size: 1/4" TO 2"
FRL Unit: Filter, Regulator, & Lubricator - How They Work | Tameson.com
3/4" FRL Filter Regulator Lubricator | ATO.com
Pneumatic Air Source Treatment Unit, Air Filter Pressure Regulator With Gauge, Frl Combination Air Filter Regulator Lubricator - Sprayers - AliExpress
Wilkerson - FRL Combination Unit: 1/2 NPT, Compact, 3 Pc Filter-Regulator-Lubricator with Pressure Gauge - 11760204 - MSC Industrial Supply
Amazon.com: SNS Compressed Air Filter Regulator Lubricator FRL Three Unit Combo 1/4" NPT, Semi-Auto Drain, With Gauge and Bracket, Metal Bowl AC3000-N02 : Industrial & Scientific
Amazon.com: SNS Compressed Air Filter Regulator Lubricator FRL 1/4" NPT, Semi-auto Drain, With Gauge and Bracket, Metal Bowl Two Units Combo AC3010-N02A : Industrial & Scientific