tender for maintenance kit for double brake indicator ftrtil part no. 790 045 110 (forfaiveley make air brake system) of lhb coaches consisting of 04 items. 1. o ring (id-dia67x2.5 thk) part no. 045 7011 00a qty/set 04 nos. (2) o ring (id-dia 24.6 x3.6 thk) part no.045 7021 00a qty/ set 02 nos. (3) o ring ( id- dia 12.1 x 2.7 thk) part no. 045 7031 00a qty/set 02nos. (4) tube part no. 045 6011 00 qty/set 02 nos. as per drg.no. ftrtil part no. specn: ftrtil partno.