Filter, 25mm, 0.4µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC4525 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 297-0012-01 USB Communications Cable for Nephelometer Price on request 811-9917-01 Go-Cal Replacent Filter Price on request GF25080BLG Filter, MCE, 0.8µm 25mm, PCM, with Black Grid Line Price on request