Test tube rack made of polished hardwood. The rack has six holes to hold test tubes upright and 6 drying pins to hold the test tubes inverted. The holes will accommodate test tubes up to 24mm in diameter.
Sling Psychrometer, to measure relative humidity, Includes two plastic-backed Celsius thermometers, one for dry bulb measurements and the other for wet bulb measurements, Includes an activity guide with relative humidity calculation table, Requires assembly
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