For testing ammonia nitrogen “Shadowless” bottom eliminates dark spots caused by distortion of transmitted light. Made of glass specially formulated to be as free of color as possible. Marks have fused-in white filler. Package of six tubes.

Manufactured from KIMAX™ borosilicate glass, ValueWare has a low coefficient of expansion and a very high resistance to chemical attack. This means optimal performance in the lab at an affordable price. Long life expectancy, resistant to most chemicals. Ideal for general laboratory use.…

Reinforced bead top Scale is a permanent brown stain Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements

Borosilicate glass tubes with fire-polished top rims and uniform wall thicknesses for maximum heat transfer and chemical resistance. The 6 x 50 mm size is often referred to as a “Durham tube” No marking spot Designed from ASTM Specification E982, Type IV requirements …

Polypropylene closure Autoclavable Natural For use with the KIM-RAK or other disposable culture tubes.

These tubes are designed for use with Teledyne Tekmar 2016/2032 Autosamplers and 4100/4200 Automatic Samplers that are equipped with 3/4” diameter mounts. The opening of these disposable tubes is larger and it permits easier sample loading and facilitates the weighing of solid and…

These Nessler tubes are ideal for color comparison. Shadowless bottom of each tube transmits undistorted light Rings and legend are durable white ceramic enamel which correspond with specific volumes of liquid 45315A series is supplied in a matched set of 6 Graduated ring scale of…

Excellent choice for general laboratory use Plain top, beaded rim Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements

These Nessler tubes are ideal for color comparison and feature cap style stoppers that do not need to be removed to take readings. Shadowless bottom of each tube transmits undistorted light Standard Taper cap style stopper Replacement cap is 15182 (3058L93 & 3058L98) 3058K65 is…

These Nessler tubes are ideal for color comparison. Shadowless bottom of each tube transmits undistorted light Rings and legend are durable white ceramic enamel 45310A series is supplied in matched sets of 6 Graduated ring scale of any of the six tubes will not vary by more than 3…

Borosilicate glass tubes with fire-polished top rims and uniform wall thicknesses for maximum heat transfer and chemical resistance. The 6 x 50 mm size is often referred to as a “Durham tube” No marking spot Designed from ASTM Specification E982, Type IV requirements …

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…

KIMAX-51 tube made from N-51A borosilicate glass tubing with a sturdy lip and uniform wall thickness for maximum heat transfer and chemical resistance. Tube is without a marking spot.