Standards:IS 5512 & BS 4551-1
It consists of a machined brass table top 250+/- 2.5mm dia. Mounted on a rigid stand. The table top is reinforced with equally disposed ribs and allowed to conical brass mould 100mm i.d. top dia and 50mm high.
Mild steel plate 25mm thick & 250mm square for fixing to underside of the base