Filter, 37mm, 0.8µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC837 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended TE-25 Teflon Bag, Septum Valve (0.5L) Price on request 800883-171 GilAir-5 R Pump, No Charger Price on request 800143 Filter Cassette Holder Kit (required when sampling Price on request