supply of materials for cons . of culvert/cross drainage work for comm wall at south side of subhas mandal pondunder karsa g . p . , silver sand , 1st class picked jhama bricks ( traditional ) , hire charges of shuttering plank ( 25mm-30mm thick ) without prop including all fittings , stone aggregate ( single size ) :20 mm nominal size , portland cement , stone aggregate ( single size ) : 10 mm nominal size , stone aggregate ( single size ) 40 mm nominal size , loading unloading & stacking stone aggregate ( above 40mm nominal size ) , loading unloading & stacking sand/ stone aggregate ( less than 40mm nominal size ) , coarse sand , upvc pipes ( working pressure 4kg/cm2 ) singe socket pipes 75 mm dia , medium sand