Filter inside low flow modules 800518 & 800519 Back Catalog number: 201119 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended GCO37DNL Band, 37mm Shrink, White, 1000/Pack Price on request 830-0001-01 Model AP-20S Gas Detection Pump Kit Price on request GCU37500PVC-2 Cassette, 37mm 2pc 5.0µm PVC, 50/Box Price on request