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Test tube clamps hold fast to test tubes for safe handling.
Wide range pH test paper is used for determining the alkaline or acid content of liquid. Solutions...
Jumbo roll for easy to read color charts. Dimensions: 50 ft. x 0.5 in. (15.2m x 1.27cm)
An easy adjusting nut provides 360 degrees jaw rotation. It will attach to rods up to 3/4" diameter....