Teflon Bag, On-Off Valve (1.2L) Back Catalog number: TE-21 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 375-0008-01 Protective Rubber Boot for Nephelometer Price on request 783-0008-04 Battery Pack, Replacement BDX II, NiMH Price on request C-BIO02-01 BioVOC-2 Breath Sampler, pk 1 Price on request