Filters are designated by the size of particle that will pass through them using the micron for measurement; as an example, a single grain of table salt measures 149 microns. A 10 microns Filter for manifold injectors, and only 5 microns for direct injectors.
D4D, D5B, D6C, D7F, 627, 941B, 951C, 977L, 225, 528, 815