This Vertex washable and reusable filter should be replaced approximately every 3-4 months when the system is running or as needed.  A dirty filter reduces the aeration system's air flow and shortens the life of the compressor.   This Vertex replacement filter fits muffler/filter housing number MUF140Z.  

Diameter (top of filter): 3.00" 

Height: 1.25"

Reference the nameplate on your compressor whenever possible to ensure the proper Vertex filter part number and/or size that is required.