75mm Aluminium Flask
Traditional Jewellers metal casting flask/moulding box robustly made from Aluminium
10 swg Aluminium tube thickness 5mm 
Made from 2 interlocking casting rings to ensure perfect alignment.
Outer dimensions 75mm wide and 75m two parts are combined height
The clay will need to thoroughly hammered to a tight compression or it will collapse when you remove the original piece.
We use talcum on all seals and insides to help with release.
These are also ideal for those interested in Delft clay casting
Be aware you purchase mould only not sand