supply of brake release choke for keo typebrake release choke for keo type,brake release choke for keo type distributor valve of air brake wagon having bmbs escorts. drawing no : bmbs knorr pt. no. c156067/1 or escorts pt/drg. no. 4a 31657/13, alt. 35. material and sp ecification : as per drawing and conforming to rdsos spec. no. wd-23- bmbs -2008 (rev. 1) amend. no. 1 o f sept. 2016. warranty / guarantee : the firm shall stand guarantee, unless otherwise specified in the specificatio n of individual component/sub assembly, for a period of 36 (thirty six) months from the date of fitment of the syst em [ warranty period: 30 months after the date of delivery ]