US$ 49.99
and ring magnets with plotting compasses
Nineteen-piece electrostatics kit anchored by a gold-leaf electroscope
used to demonstrate capacitance and the discharge of stored static charge
Built around electron-microscope reference detail
Universal Lab Clamp Holder with Dual 360° Rotation, up to 3/4" Rods Capacity_10mL and ring magnets with plottingUniversal laboratory clamp holder with dual 360 degree boss head rotation, accepting rods up to three quarters of an inch for positioning apparatus at any angle.