supply of set of must change rubberset of must change rubber,set of must change rubber items kit of schaku coupler as per rdso specification no. 6 1-b-36/rev.68-1, with amnd. slip no.- 1 of october- 2016.%u201d one coupler set consisting of follow ing 3 items in plastic pouch kit. i) rubber tube for air pipe coupling as per schaku drawing no. 13-088 -03-15 (4) or escorts drg. no. sk-763 or sanrok drg.no. 2ed-181-1070 or similar drg. no. of wsf. qua ntity in one set-02 nos. ii) sealing ring for air pipe coupling as per schaku drawing no. 13-088.03-16 ( 4) or escorts drg. no. sk-764 or sanrok drg. no. 2ed-181-1071 or similar drg. no. of wsf. quantity in one set-02 nos.6. iii) bush polyimide for draw & buff gear of schaku coupler as per schaku drawing n o. 40-586-06-4 (4) or escorts drg. no. sk-766 or sanrok drg. no. 2ed-181-1182 or similar drg. no. of wsf. quantity in one set-01 nos. supply only from rdso approved sources acceptable as per drg. & s pecn. as per drg.no. - [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ] => limited