The plaintiff company, incorporated under the Companies Act, 1956, established a factory at Rajangaram, East Godavari District for manufacture and sale of Butyle Rubber tubes. On defendant No.2 placing an order for supply of 30,000 Butyle Rubber tubes on 18.11.1993, accepting the said offer plaintiff furnished bank guarantee of Rs.10.00 lakhs and supplied the said tubes, which are not the subject matter in dispute. Later, defendant No.2 placed a supply order on 05.01.1994 under Ex.A1 with the plaintiff for supply of 17,000 tubes and accordingly, the plaintiff supplied the same to defendant No.2. As per Ex.B7-letter, the plaintiff supplied 15,580 tubes as per the supply order leaving a balance of 1,420 tubes. While so, another supply order was also placed for supply of 6,000 tubes on 24.05.1994 by defendant No.2 under Ex.A2 and as per the said supply order, the plaintiff has to supply 3000 tubes in June, 1994 and another 3000 tubes in November, 1994 @ Rs.335.61 ps. per tube. As per condition No.16 mentioned in Ex.A1 and A2, the bank guarantee of Rs.10.00 lakhs furnished earlier, which is valid upto 31.12.1994, was permitted to continue the same or to furnish another bank guarantee valid upto 31.12.1994 for an amount of Rs.5.00 lakhs from any nationalized bank as per the proforma enclosed. Under condition No.20, the invoices in duplicate should be sent in advance to the consignee to enable him to release the payment. One copy of invoice be also sent to defendant No.2 for record. Under Condition No.21, in case, the products which were tested at CIRT reveals that the material is sub-standard in quality, the test charges plus cost of material will be recovered from the supplier and the supplier will be responsible for the free replacement of unused tubes of that lot and liquidated damages @ 1/3rd price of the tubes (including Excise duty and all other taxes i.e., land cost) already used by the department of that lot. Defendant No.2 has a right to invoke the bank guarantee as well as to