Tender For supply of clean silica sand free from clay, loam, mica and other foreign material as per specification no. aar m-916-51 in 20 kg water proof non-moisturized transparent polythene bags and filling in the electrical and diesellocomotive sand boxes at psa,kur,bhc,tlhr, prdp, angl, pui,bbs, rjgr,kdjr & jkpr along with repair and maintenance of sand gear of diesel and electric locomotives at kur, tlhr , prdp , psa & jkpr round the clock as per requirement for a period of 02 years(730 days)