supply of pipe 20 nb for bobrn. , pipe 20 nb for bobrn wagon as per rdso drg. no- wd-91071-s-75 item-11&12 alt-04 & spec: 04-abr-2019(rev. 02 of dec-2019) item no 11 with both end item no 18 & 19. item no 12 wit h with one end item no 18 & 19 and other end item no 20 & 21 including fitted with item no 22 (tee 20 x 20 x 15 mm). type of pipe: erw (item description updated on 23/03/26) specn: rdso drg no. w d-91071-s-75, item-11 & 12, alt- 03, specification no. 04-abr with latest amendment [ warranty pe riod: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]