Equip your vehicle to be Ready for the Road Ahead™ with the Buyers Chrome Filler-Strainer Breather Cap Assembly, a replacement component that prevents vacuum from building up in reservoir tanks. By utilizing a mesh filtration system that filters the hydraulic fluid of contaminants such as water and debris, this replacement cap ensures the reservoir valve and tank can process clean fluid and 'breathe'. Built with a 30 mesh/500 micron strainer to capture even the most minute of particles. FleetPride is your First Click in Heavy Duty®.