paper roll 20 1/4" x 100 yds Precon 3 40 micron MS 815-20A Coolant filter,Quantity pricing available, One roll of rayon/polyester blend filter paper - 2" core (1" core adapter plugs and 3" cores also available).Coolant filter paper roll 20 1/4" x 100 yds Precon 3 40 micron MS 815-20A,40 micron MS 815-20A Coolant filter paper roll 20 1/4" x 100 yds Precon 3, Business & Industrial, CNC, Metalworking & Manufacturing, Process Engineering Equipment, process equipment, Filtration Process Equipment.