Filter, Support Pads, Porous Plastic, 37mm, 20.0µm Back Catalog number: GPP3700 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800255 Single Variable Flow Kit, 7-10 x 110mm Price on request SC-7 Tedlar Bag (12.0L) Price on request 830-0001-01 Model AP-20S Gas Detection Pump Kit Price on request