The MILTON 1109 1/4" NPT Piggyback Filter Regulator is a unit manufactured by the brand Milton, known for producing high-quality automotive air tools. This product combines a filter and regulator in a piggyback design, making it convenient for filtering and regulating air in automotive systems. With its 1/4" NPT size, this filter regulator is compatible with various air tools and equipment used in automotive maintenance and repair. Ideal for professionals and DIY mechanics alike, the MILTON 1109 is a reliable and efficient addition to any workshop.