Filter, Support Pads, Porous Plastic, 37mm, 20.0µm Back Catalog number: GPP3700 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 700721 Printer only, Gilibrator-2 Price on request 910-0910-EU-R GilAir-Plus Data Logging Single Starter Kit, Bluet Price on request 360-0162-01 Go-Cal Manual Price on request