As an Amazon Associate, we earn from qualifying purchases. Home » Cole-Parmer » EW-98928-54 Accessories for Koehler Saybolt Viscometer Bath. Product Type Viscometer Tube, Brand Koehler. Viscometer Tube, Stainl... Cole-Parmer . EW-98928-54 Attributes Brand name, Manufacturer name, ManufacturerCole-Parmer