> I use 2 micron and they changed from brown to tan, I believe all the Racor filters for the 500 series, 2,10, and 30 micron have all changed to tan. The filter micron is determined by the color of the writing on the top of the filter. The 2 micron has brown writing on the top, the 10 micron has blue writing, and the 30 micron has red writing. Larry Gregory Outer Reef Rockport, Texas