Product Details: Update your semi with clean diesel exhaust fluid, with the Fleetguard Diesel Exhaust Urea Filter that ensures you're Ready for the Road Ahead™. Due to its specialized design, this replacement filter is able to remove contaminants from the DEF solution so that the selective catalytical reduction system can perform at optimal levels. Constructed with a rugged and long-lasting design to reduce the frequency of change intervals. FleetPride is your First Click in Heavy Duty®.