Kimble Chase KIMAX ESR tubes measure the rate at which red blood cells settle out of plasma. The Wintrobe tubes can be used with the standard or the modified Wintrobe procedure. Precision-drawn glass and accurate calibrations ensure that results are accurate with standard normal values. These tubes have round bottoms and are filled with a 9" Pasteur pipet. They are calibrated in yellow. They are manufactured from 90 expansion soda lime glass conforming to USP Type III requirements.
Kimble Chase Life Science and Research Products manufactures scientific laboratory glassware under the Kimble Chase brand. The company has its origins in Kimble Glass and Kontes Glass and is now a division of The Gerresheimer Group.