supply of stop board of size 600mm diameter made out of 1mm thick gi sheet with high intensive prismatic retro reflective sheet and background red colour and letters in three languages english, hindi & telugu of colour white as per the railway standards with minimum reflectivity distance of 250 mtrs with all necessary fixing clamps, bolts and nuts to suit for electric lifting barrier as per drg.no. s&t/mft/6077.adv.1 or latest amendment .stop board of size 600mm diameter made out of 1mm thick gi sheet with high intensive prismatic retro reflective sheet and background red colour and letters in three languages english, hindi & telugu of colour white as per the railway standards with minimum reflectivity distance of 250 mtrs with all necessary fixing clamps, bolts and nuts to suit for electric lifting barrier as per drg.no. s&t/mft/6077.adv.1 or latest amendment .,stop board of size 600mm diameter made out of 1mm thick gi sheet with hig h intensive prismatic retro reflective sheet and background red colour and lette rs in three languages english, hindi & telugu of colour white as per the railway st andards with minimum reflectivity distance of 250 mtrs with all necessary fixing cl amps, bolts and nuts to suit for electric lifting barrier as per drg.no. s&t/mft/6077.a dv.1 or latest amendment . [ warranty period: 30 months after the date of delivery ] ]