Donaldson Blue bulk fluid filters incorporate the best technology and construction to handle all fuels and lubricants in all operating environments. Donaldson Electrostatic Reduction Technology (D.E.R.T.™) prevents filter media damage from electrostatic discharge. Epoxy is used in filter construction for increased fluid compatibility. E-coating provides maximum corrosion resistance and epoxy adhesion. fluorocarbon o-rings provide reliable sealing and maximum fluid compatibility.