BYK-Gardner 5800 Wolf-Wilburn Pencil Hardness Tester
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<b>[Product Information]</b><br>
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<li>Twenty pencils (grade 9B to 9H) are used with a standard holder</li>
<li>Pencils are moved with a fixed pressure of 750 grams and a fixed angle ensuring the least amount of operator error</li>
<li>Pencils can be easily exhanged to minimize down time during the test</li>
<li>Changeable from König to Persoz by means of a third light barrier</li>
<li>Simple laboratory measuring instrument for hardness measurements in accordance with the König and Persoz methods.</li>
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