supply of constant contact side bearer for blcam/blcbm wagon. drawing no:- wd-07067-s/1, al t-1, item no. 18 spec. no:- contr-01-misc-2007(rev-01), amendment no.1 of jan-2022 or variant a of spec. wd-62-misc-17, amendment no. 1 (drg. no. wd-17025-s/1_alt. 1). expected service life an d guarantee period:- the offered design of constant contact side bearer assembly including housing a nd spring element/s is expected to work satisfactorily for a period of 72 months on indian railways wo rking conditions. hence offered ccsb shall be guaranteed for a period of 05 years (sixty months) from the month and year of manufacturing. (for details please see relevant spec. as mentioned above). [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]