Premium Beech Wood Test Tube Rack for 12 Tubes, 28mm Capacity_10mL this Van de Graaff generator

this Van de Graaff generator delivers spark-producing high-voltage demonstrations in the physics classroom

5 mm in diameter

gripping objects up to 90 mm and mounting to support rods up to 15 mm for chemistry and physics setups

ground to polished beveled edges and usable as a top-spinning base in secondary mechanics demonstrations

exposing the triangular rotor's epitrochoidal motion with a lamp-lit ignition point

Premium Beech Wood Test Tube Rack for 12 Tubes, 28mm Capacity_10mL this Van de Graaff generatorPolished beech wood test tube rack with twelve vertical holes sized for tubes up to 28 mm diameter, built for classroom and professional laboratory storage.