Filter, Tissue Quartz, (99.90% retention of 0.3µm Back Catalog number: GF25TQ Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-1004-02 PM-10 Impactor Kit, Replacement for Models 810-100 Price on request 811-0944-02-R GilAir Plus, DL to DL BlueTooth and Motion Upgrad Price on request 800255 Single Variable Flow Kit, 7-10 x 110mm Price on request