GilAir Plus, DL to STP Upgrade (factory only) Back Catalog number: 811-0945-01-R Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended GCU37500PVC-2 Cassette, 37mm 2pc 5.0µm PVC, 50/Box Price on request 830-0001-01 Model AP-20S Gas Detection Pump Kit Price on request 910-0202-02 GilAir-3 Basic [ATEX], 5-Pack (With Universal 5-Un Price on request