Spare Gilley Coils Set, 2-Piece, 4.5cm OD cylinder Fourteen-orbital-shape model set with detailed

Fourteen-orbital-shape model set with detailed illustrated instructions

this deluxe optics kit covers reflection

Manually-operated seismograph model that traces shock waves onto a pulled paper strip

Converts flowing-water kinetic energy into electricity through a mini water turbine coupled to a dynamo

this polished hardwood funnel-and-burette stand adjusts height up to 18 inches for consolidated benchtop chemistry workflows

Spare Gilley Coils Set, 2-Piece, 4.5cm OD cylinder Fourteen-orbital-shape model set with detailedReplacement pair of Gilley coils with a 1. 5cm inner and 4. 5cm outer diameter, sized to keep electromagnetism demonstrations running when the original coils wear out.