In accordance with the provision of the Contract for the supply of Ball Control Valve 3601-1-FV-017 as per purchase order no.3120008322 date 28 April 2014 (hereinafter referred to as the Contract) the contents of which have been noted by us that Messrs. , Metso Automation Co., Ltd. (hereinafter referred to as “Metso”) has to deposit with PTT Public Company Limited (hereinafter referred to as PTT) a performance security for the proper and faithful performance of the Contract in the amount of (in words) THB720,000 (Seven Hundred Twenty Thousand Baht Only) which is 10 percent of the total Contract Price, we, Citibank N.A. Bangkok Branch as instructed by the _____ Metso ______, agree unconditionally to irrevocably guarantee as primary obligor and not as surety merely, the payment to PTT on its first demand, without whatsoever right of objection on our part and without its first claim to the ____ Metso _____, in the amount not exceeding (in words) THB720,000 (Seven Hundred Twenty Thousand Baht Only) in the event of the obligations expressed in the above-mentioned Contract have not been fulfilled by the ___ Metso ___, giving PTT the right of claim for penalty, damages, liquidated damages or any expenses for which the___ Metso ___ may become liable to PTT under the Contract.