supply of o ring for axle box. size 250x3 , nvr 18 [o ring for axle box. size 250x3 , nvr 1872 as per abb drg no ib012-00750 , rev 0 or latest for all locos. note: the firms with past performance of the tendered/similar items subject to submission of proof of documents such as pos/r note are only eligible.]o ring for axle box. size 250x3 , nvr 18 [o ring for axle box. size 250x3 , nvr 1872 as per abb drg no ib012-00750 , rev 0 or latest for all locos. note: the firms with past performance of the tendered/similar items subject to submission of proof of documents such as pos/r note are only eligible.],o ring for axle box. size 250x3 , nvr 1872 as per abb drg no ib012-00750 , rev 0 or latest for a ll locos. note: the firms with past performance of the tendered/similar items subject to submission of proof of do cuments such as pos/r note are only eligible. [ warranty period: 30 months after the date of delivery ]