Nephelometer O-Ring, Replacement Back Catalog number: 385-0115-01 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended KB-50 Kynar Bag 50.0L Price on request 783-0018-01 Battery Pack, Gilian 12 (NiMH) Price on request 811-9917-01 Go-Cal Replacent Filter Price on request