supply of stop board of size 600mm diameter made out of 1mm thick gi sheet , stop board of size 600mm diameter made out of 1mm thick gi sheet withhigh intensive prismatic retro reflective sheet and background red colour andletters in th ree languages english, hindi & telugu of colour white as per therailway standards wit h minimum reflectivity distance of 250 mtrs with all necessaryfixing clamps, bolts and nuts to suit for electric lifting barrier as per drg.no. s&t/mft/6077.adv.1 or latest amme ndment as per drg.no. of size 600mm diameter made out of 1mm thick gi s specn: of size 600m m diameter made out of 1mm thick gi sheet withhigh intensive prismatic retro reflective [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]