Spare 3" O-Ring Belt for Van de Graaff Generator Chemical_Methylene Chloride Surface arteries painted over 8

Surface arteries painted over 8 removable brain sections reveal cerebrovascular anatomy alongside structural divisions

25 x 2 x 1 inches with a sliding top

running on mains or battery with a 15 by 17 cm pan for routine weighing in classrooms and stockrooms

supporting water-quality and environmental-science investigations in classroom labs

Long-and-narrow 6 by 1-inch plane glass mirrors arrive as 10-packs at ~2mm thickness

Spare 3" O-Ring Belt for Van de Graaff Generator Chemical_Methylene Chloride Surface arteries painted over 8Spare 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.