supply of brake gear arrgt. for wap4 locos in set, one set consists of all items as pe r clws drg.no. 03/1/19/36 alt.17 indicated in spec./drawing [except ref. 55 and ref-35 i.e. br ake cylinder assly and brake shoe assly.] bush and pin material : mn steel to irs r-65-78[ mn steel pins and bushes should be taken from clw's approved source] to clw drg. no. 03/1/ 19/36 alt. 17 [matl. as per is : 2062/2011]. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age