5-Piece Quartz Collection Rock and Mineral Specimen Set Chemistry_Chemistry Charts & Molecular Models Cover-protected 10-ohm 4A single rheostat

Cover-protected 10-ohm 4A single rheostat with constantan winding on a 200x56mm tube and 4mm safety socket terminals

kept on hand so the dome can keep building charge once the original belt wears thin

Foundational 12-slide introductory set covers plant and animal tissue preparations for first-year microscopy work in general biology classrooms

this zinc-plated cast iron triangular tripod stands 8

5 by 3 by 1

5-Piece Quartz Collection Rock and Mineral Specimen Set Chemistry_Chemistry Charts & Molecular Models Cover-protected 10-ohm 4A single rheostatFive piece quartz collection showcases color varieties from clear rock crystal to smoky, rose, and amethyst quartz for variety identification practice.