supply of inner coil spring and outer coil spring (two items) , inner coil spring for mk-50 draft gear, (item to be supplied with work testcertificate) to besco drg.no. item - 10 of fig- 19. part no. s-126-2. sr. no. 8 of annexure b [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 la cs ] ] , outer coil spring for mk-50 draft gear, confirming to rdso str no.49-bd-08 (item to be supplied with work test certificate) besco drg.no.item no.11 of fig. 19 in besco manual rev.1 of mar ch 99, alt.nil. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 la cs ] ]