Stackable D-Size Battery Cell Holder, Alternate Model Material_Borosilicate Glass sliding freely through the ring

sliding freely through the ring when cool but arrested once flame heating expands the ball beyond fit

lightweight and shatter-resistant for image-formation and ray-tracing experiments

Demonstrates that fluid pressure transmits equally regardless of vessel shape through a Pascal's-law kit of four plastic vessels with leak-proof metallic collars and a weight-loaded balance pan

Chrome-plated 60mm reading magnifier extending to a 20cm focal length

Stackable D-Size Battery Cell Holder, Alternate Model Material_Borosilicate Glass sliding freely through the ringStackable D cell holder in durable plastic with metal contact plates, linking to additional holders in series or parallel to extend bench circuit voltage or capacity without soldering.