Filter, Support Pads, Porous Plastic, 37mm, 20.0µm Back Catalog number: GPP3700 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended TE-25 Teflon Bag, Septum Valve (0.5L) Price on request 801841 Carrying Case, Hard-Side, Standard (16" x 12" x 6" Price on request 611-0501-01 Flow Monitoring Software, Gilibrator-2 Price on request