Nephelometer O-Ring, Replacement Back Catalog number: 385-0115-01 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 200904 Latex Tubing, 1/4" ID (18"), Standard/High Flow, G Price on request 360-0162-01 Go-Cal Manual Price on request 801841 Carrying Case, Hard-Side, Standard (16" x 12" x 6" Price on request