bids are invited for glass reinforced concrete grc screens of 8 feet x 4 feet , stainless steel grade 304 main drain cover of size 2 feet 3 inch x 1 feet 11 inch , double action hydraulic floor spring make sandhu or equivallent , expendable fastner 6 inch , floor nozzle with necesary stainless steel screws 63mm , floor nozzle with necesary stainless steel screws 40mm , motar starter star delta starter 10hp motor , mortor starter dol starter 1 point 5 to 3hp motor , activated media sand , ball valves isi controllong the pressure of the flow double union 63 mm , non return valve isi of 150 mm diameter ci , aluminium wire total quantity : 640