A scale is provided for measuring the deflection of the leaf.
dual purpose gold leaf electroscope has a metal plate to which a single gold leaf may be attached and is supported by an insulating bush in a metal case with a 4mm socket earthing terminal.

Physics School Lab Equipment Suppliers in India 

Ltekonline are the manufacturers of Gold Leaf Electroscope Electrostatic Lab used to demonstrate engineering principles in Engineering Colleges, Engineering Schools and Physics Lab Experiments for Engineering Teaching Lab in Universities