supply of coupling flex 2-1/2 inch to emd pt. no. 9516671. note: the firms with past performance of the tendered/same items subject to submission of proof of documents such as pos/r note are only eligible.coupling flex 2-1/2 inch to emd pt. no. 9516671. note: the firms with past performance of the tendered/same items subject to submission of proof of documents such as pos/r note are only eligible.,coupling flex 2-1/2 inch to emd pt. no. 9516671. note: the firms with past performance of t he tendered/same items subject to submission of proof of documents such as pos/r note are only eligible. [ warranty period: 30 months after the date of delivery ] ]