The four-gap bridge has a large and heavy copper strip of mounted on a heavy 3/4 inch thick laminated base.
Nine heavy Brass terminals lock type are provided to reduce the resistance to a minimum.
The ends gaps are closed by removable Copper Binding pieces which are held in position by the terminals.
The 24 SWG constantan wire is stretched along the top of wooden meter scale and securely clamped to the Brass end strips so that end errors are negligible.
Supplied complete with pencil jockey along with lead for connections. 

Physics School Lab Equipment Suppliers in India 

Ltekonline are the manufacturers of Meter Bridge or Wheatstone Bridge With Pencil Jockey Electronic and Electric Lab used to demonstrate engineering principles in Engineering Colleges, Engineering Schools and Physics Lab Experiments for Engineering Teaching Lab in Universities