The Microgard shows 99% at 25 microns so right in line with the Baldwin. But at only $12, the Microgard does come in about 7 bucks cheaper than I'm getting the Baldwin so that's a win. The Baldwin B7039 is a 9.8 nominal-27 absolute micron filter. Your best bet on Balwin pricing is order a case of 12 from a local Baldwin Distributor parts store. Baldwin has a nationwide sale on all their filters for one month once a year. As a general rule, if you look up a Baldwin filter on let's say Amazon, you can buy that same filter at a local distributor in your town for about half the Amazon.com price. You may have to go to your local Peterbuilt or Kenworth dealer to get them, they deal a lot in heavy duty and industrial stuff. They have a "where to buy" link on their home page.