supply of materials for construction of gravel road from the house of ramani barman up to the house of nirarab saha at natabari-ii gp , carriage of stone aggregate below 40 mm nominal size , loading unloading & staking sand / stone aggregate ( less than 40mm nominal size ) , river bed materials , stone aggregate ( single size ) : 63 mm nominal size , carriage of stone aggregate 40 mm nominal size and above , loading unloading & staking sand / stone aggregate ( above 40mm nominal size ) , stone screening type a ( 13.2 mm ) , hire charges of diesel road roller 8-10 tonne , display board , gst