Graco 235004 3/4-Inch UNF Inlet Strainer Screen for Airless Paint Spray Guns Go to amazon.com Related posts Thing need consider when find inlet strainer screen? FeatureFits Graco 390 and Nova SP pumps3/4" UNF threadReplacement part DescriptionPump inlet filters help prevent debris from being suctioned into the pump, causing damage to your sprayer.