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en.wikipedia.org/wiki/Test_tube_holder

A test tube holder can be made from wood or metal. It is used for holding a test tube in place when the tube is hot or should not be touched. For example, a test ...

en.wikipedia.org/wiki/Test_tube

A test tube, also known as a culture tube or sample tube, is a common piece of laboratory glassware consisting of a finger-like length of glass or clear plastic tubing, open at the top and closed at the bottom. Test tubes are usually placed in special-purpose racks.

www.answers.com/Q/What_is_the_function_of_a_test_tube_holder

A test tube holder is used to hold a test tube when it is hot.testube holder is the tube that you test with a holder.

www.arborsci.com/test-tube-holder-stoddard

Brass Stoddard test tube clamps easily hold test tubes up to 25mm in diameter.

www.spectrumchemical.com/chemicals/Test-Tube-Rack

Spectrum carries Test Tube Rack in various forms, grades and quantities. Choose from our top selling products that suit your needs, and don't hesitate to call us ...

www.labconco.com/product/test-tube-holders/2443

Test Tube Holders are add-on accessories to the Lower Test Tube Spindle Rack. The Holders keep tubes upright. Constructed of Type 304 stainless steel.

www.sciencecompany.com/Test-Tube-Clamp-Holder-P6285.aspx

This test tube holder, or clamp, is 6.25 inches long with finger grips. Holds any size test tube. The test tube holder is used to hold test tubes when they are hot ...

www.coleparmer.com/i/cole-parmer-wooden-test-tube-holder-1-ea/0673905

Mar 3, 2014 ... Buy Cole-Parmer Wooden Test Tube Holder, 1/ea and more from our ... Pyrex 9800-18 Test Tube; 27 mL, pack of 72 SI-34569-06. 3456906.

www.bischoff-chrom.com/fraction-collector.html

The standard test tube rack will hold 120 tubes with a diameter of 12 ~15mm ... of the unit is made of flame retardant ABS plastic, and the test tube rack and drain ...

www.dorthonion.com/drcmcm/CHEMISTRY/CourseInfo/Labs.php

You may use any convenient units so long as you are consistent and willing to do the math to convert to SI (metric) units when necessary. ... Substitute: a wide glass jar can be used if a single test tube will stand upright with enough tube above ...