US$ 32.95
Square die-cast alloy boss head with metal thumbscrews
polythene plates
this 20mm-diameter steel helix carries longitudinal
safely grounding accumulated static charge during high-voltage demonstration work
Wooden Test Tube Support, 13-Place Material_Borosilicate Glass Square die-cast alloy boss headThirteen place hardwood test tube rack combining seven 19 mm holes and six 25 mm holes with six draining pins for mixed size tube storage in student laboratories.
US$ 32.95
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