supply of carbon brush block for traction motor type hitachi hs-15250 a as per rdso specification no. elrs / spec / cb / 0027 ( rev., carbon brush block for traction motor type hitachi hs-15250 a as per rdso specification no. elrs / spec / cb / 0027 ( rev.0 ) of sept-2003 with amendment no.1 of date 25.08.2005 and confirming to rdso drawing no.el.3.bs.013 ( mod ) .alt.5 or latest. note : the following grades are only acceptable. 1. acpl using grade eg-105 ( s ) imported / indigeneous of acpl or mersen india using imported grade eg- 9049 of mersen / france or mersen india using grade eg-8220 of mersen india. 2. mersen india using imported grade eg- 9049 of mersen / france should obtain carbon brush blocks for manufacture of brushes from approved manufacturer after inspection by rites ) . [ warranty period: 30 months after the date of delivery ]