. supply of different materials for construction of 16 nos. zeol fish tank for eco friendly hydroponic system under dinhata village-i gp within dinahta-i dev. , 1st class brick , portland cement , stone aggregate (single size) : 20 mm nominal size , stone aggregate (single size) : 10 mm nominal size , stone aggregate below 40mm nominal size , loading and unloading stone aggregate below 40mm nomina size and above , coarse sand , hire charges of shuttering plank ( 25mm-30mm thick) without prop including all fiting , g i wire , tor steeel roads , 1st class bricks (kiln burnt) , medium sand , m.s. structure with hollow sectins (square or rectangula shape conforming to is 806-1986 soan yopti 12 mtr , galvanised steel corrugated sheets , galvanised steel bolts & nuts 6mm dia and 25 mm long round head with slots , galvanised steel j or l hooks 8 mm dia , material display board