supply of difference construction materials and loading , unloading stacking etc . at gopalbati gram panchayat area under balurghat block mentioned in annexure-a . , fine sand , 1st class picked jhama bricks ( traditional ) , stone aggregate ( single size ) : 10 mm nominal size , portland cement , portland cement , hire charges of surface vibrator , coarse sand , hire charges of shuttering plank ( 25mm-30mm thick ) without prop including all fittings , eucalyptus bullah ( 17 . 5cm -20cm dia ) , nail , eucalyptus bullah ( 12 . 5cm -15cm dia ) , bamboo ( 8cm-10cm dia ) including fixing , empty gunny bag , thermocol 12 . 5 mm thick . , polythene sheet ( 150 gm per sqm ) , hire charges of monkey set , hire charges of concrete mixer 0 . 25 to 0 . 40 cum with hopper