supply of bolster liner for cast steel bolster for casnub 22w bogiebolster liner for cast steel bolster for casnub 22w bogie,bolster liner for cast steel bolster for casnub 22w bogie to rdso drg. no. sk - 77578, a lt. 6, item no. 2. material is silico-manganese steel to is-3885 part-1,gr iv (reaffirmed-2022). note :(i) all silico- manganese liners shall be marked for manufacturer initial and month and the year of manufacturing by metal laser engraving in 6 mm size and 0.1 mm minimum.(ii) liners shall be fitted in such a way that marking lies on oppo site to wearing surface. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lac s ] ] => limited