Quartz fiber filter, grade QR-100, 203 x 254mm, 37g/m², 0.38mm thick. No binder, max. temp. 1000 °C. Excellent chemical resistance, biologically inert. Air pollution analysis; sample acidic gases at over 500 °C.
TE-QMA-47, 47mm Micro-Quartz Filters, Tisch Environmental Inc.
90MM Quartz Microfiber Filter, 100/PK | Zefon International