Made of cast press. distance across 75 mm approx. with stopcock and handles.

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Manufactures,Suppliers,Exporters of Magdeburg Hemispheres for Physics Lab. Contact us to get Superior Quality designed Magdeburg Hemispheres For Physics Lab for schools,  colleges, investigate labs, research facilities and different businesses.We acknowledge bulk orders for government tenders for worldwide.
DUBAI,SOUTH AFRICA, EUROPE,INDIA,USA,AUSTRALIA,CANADA,UAE,NEW ZEALAND,UK.

http://www.labinstro.com/shop/physics/mechanics/magdeburg-hemispheres-lime-8200-112/