Polypropylene Test Tube Rack for 40 x 20mm Tubes Subcategory_Dropping Funnels this silicone-belt Van de Graaff

this silicone-belt Van de Graaff generator demonstrates charge conservation

showing how the center of gravity of a solid passes through its support polygon

Single-pole double-throw switch on a demonstration base

paired with the 750mm black lead to keep wiring color-coded across mid-distance bench setups

Rooster dissection model demonstrates avian anatomy

Polypropylene Test Tube Rack for 40 x 20mm Tubes Subcategory_Dropping Funnels this silicone-belt Van de GraaffSnap together polypropylene test tube rack holding 40 tubes up to 20 mm across a 9. 75 inch length, shipping flat and disassembling for easy cleaning between uses.