"These viscometers measure kinematic viscosity of bitumens and road oils at 140°F (60°C) and asphalt cements at 275°F (135°C). Precision is ±0.2%. Using only a 1-3ml charge, the viscometer can be filled and cleaned while immersed in a constant temperature bath. Instrument requires a liquid depth of 9in (230mm). Each unit is supplied with permanently attached 2in (51mm) round metal holder and certificate of calibration. Viscometers with rectangular metal holders or without holder are also available. Inquire for details. Est. Ship Wt.: 3lb (2kg)."