Filter Regulator Lubrication Units (FRL) are key to preparing clean air for use in pneumatic system tools. For more information and to purchase this pneumatic FRL unit, please check out our site: br Use of prepared air allows tools and equipment to operate with maximum effectiveness and efficiency. Always use an Air Tool Filter Regulator and Lubricator with REED pneumatic tools such as the Saw It® and Universal Pipe Cutters. Failure to use an FRL may result in premature motor failure and will negate warranty.