As an Amazon Associate, we earn from qualifying purchases. Home » Cole-Parmer » EW-98928-74 Accessories for Koehler Saybolt Viscometer Bath. Product Type Glassware, Brand Koehler. Receiving flask, Pyrex glass,... Cole-Parmer . EW-98928-74 Attributes Brand name, Manufacturer name, ManufacturerCole-Parmer