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Ball & Ring Gravesande"s

Ball & Ring Gravesande"s

SKU:43BR20

Diametrical expansion. A metal ring with accurately machined hole, mounted on a rod with an insulated handle. A close fitting metal ball is attached to the rod by a brass chain. When ball is heated, its expansion prevents it from passing through the hole. Overall length: ~215mm.

Regular price $12.75 NZD
Regular price Sale price $12.75 NZD
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