supply of set of must-change items for trident , set of must-change items for trident make air dryer, model no. ld2000132, to be replaced d uring poh maintenance of emu/memu/demu coaches, as per trident spare kit no. m12-as882, consisting o f 06 items- a) ad433filter element 8qu 15 095 - qty./set-1 no. b) cd668 cup top filter - qty./set-1 no. c) c d 669 cup bottom filter - qty./set-1 no. d) as 443 spare kit filter bottom d1) co084 o ring 26.7 x 1.78 - q ty./set-1 no. d2) co086 o ring 88.57 x 2.62 - qty./set-1 no. e) as 444 spare kit valve double poppet e1) a d1590 poppet assembly- qty./set-2 nos. e2) co009 o ring (31.6 x 2.4) - qty./set-1 no. e3) co083 o ring ( 41.00 x 1.78) - qty./set-1 no. e4) co085 o ring (34.59 x 2.62) - qty./set-1 no. e5) co087 o ring (3 x 1.25) - qty./set-2 nos. e6) cd675 filter bottom spring- qty./set-1 no. f) ac077 filter element m250y- qty./set-1 no. [ warranty period: 30 months after the date of delivery ] ]