Spare 3" O-Ring Belt for Van de Graaff Generator Human Anatomy_Human Anatomy Models Borosilicate glass equilibrium-tube apparatus at

Borosilicate glass equilibrium-tube apparatus at 6

ready for acid-base titration endpoints and universal indicator preparation in chemistry labs

28 inch outer diameter for glassblowing

Hand-crank centrifuge spins four 15mL tubes for teaching sedimentation

One-microfarad electrolytic capacitor in an ABS module with 4mm sockets

Spare 3" O-Ring Belt for Van de Graaff Generator Human Anatomy_Human Anatomy Models Borosilicate glass equilibrium-tube apparatus atSpare 3 inch O ring drive belt sized to the smaller Van de Graaff pulleys, kept on hand to keep electrostatic generators running once the originals stretch out of tolerance.