The top graduation line on unmatched Kimble Nessler Color Comparison Tubes may be any distance from the outside bottom within the range of scale lengths shown in individual descriptions.
In matched sets, the top graduation lines of all the tubes in a set will be within the very close limits for a set given in catalog descriptions. However, the average distance of these lines from the outside bottom for a set may be anywhere within the range of scale lengths.
In case lots of matched sets, the average distances of the top lines from the outside of the bottom may vary from set to set anywhere within range of scale lengths. All graduation lines and legends are durable white ceramic enamel.
With the "Shadowless Bottom" feature. Taller and more narrow with a much longer scale length than (3058B06). The 50 mL size is specifically mentioned by the American Public Health Association in Standard Methods for the Examination of Water and Waste Water (Method 4500-NH3). Rings and legend are durable white ceramic enamel. Rings coincide with specific volumes of liquid. Designed from Federal Specification NNN-T-175, Type 1, Class 2 requirements. Supplied in a matched set of 12. Graduated ring scale of all 12 tubes is within 1.5 mm (50 mL).