The 2 classes are Course A and Course B. Class A pipettes are produced to exact tolerances, or "error limits". Course B are authorized 2 times the mistake limitations of Class A. The class specification or serial amount of Course B will not be marked. The two glass and plastic https://gunnervvuus.tblogz.com/what-does-types-of-pipettes-used-in-laboratory-mean-43530991