supply of set of must change rubber items kit of schaku coupler as per rdso specification no. 61-b-36 / rev.68-1, with amnd. slip no.- 1 of october- 2016. one coupler set consisting of following 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. quantity 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. ( iii ) bush polyimide for draw & buff gear of schaku coupler as per schaku drawing no. 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. & specn. [ warranty period: 30 months after the date of delivery ]