Parts Store › Pre-Drain Filters (case of 10) Image 1 of 1 Pre-Drain Filters (case of 10) $552.00 20 Micron filter cartridges for the Stencilwasher systems. Comes in a case. of 10. Quantity: Purchase Added! 20 Micron filter cartridges for the Stencilwasher systems. Comes in a case. of 10.