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 811-0505-01-R Single Unit Replacement Charger only, USB Gilibrat Price on request 385-0117-01 Tri-pod mounting bracket for Nephelometer (Tri-pod Price on request 800883-171-2305 GilAir-5 R Pump, 5-Pack with Universal 5-Unit Char Price on request