Filter Cassette Holder Kit (required when sampling Back Catalog number: 800143 Manufacturer: SENSIDYNE Availability: 3 weeks Price on request - + Recommended 783-0008-03-R Battery Pack, GilAir-3UL, ATEX, NiMH Price on request 830-0001-01 Model AP-20S Gas Detection Pump Kit Price on request 375-0009-01 Carrying Case for Nephelometer Price on request