14 May 2008 Subject: Clarification of 20% change in operating result of 1st Quarter 2008 compare to the same period last year Attention : Director and Manager of Stock Exchange of Thailand Further to the submission of Financial Statement for the first quarter end 31 March 2008 to SEC on 14 May 2008, the net profit of 1st Quarter 2008 was equal to 28.54 million Baht, increased from the same period last year 66.2 million Baht which represent more than 20% change. The company therefore would like to explain the reasons as follows: 1. Total revenue of 484.59 million Baht, increased by 300.18 million Baht or 163% increase. This was due to increase in volume of orders received in advance and also well manageable on-time delivery. 2. Gross profit margin was equal to 20.04% compared to the same period last year 8.4% or representing 138.6% increased as a result of having profit in line with the budget with well cost control. 3. Interest expense of 6.51 million Baht decreased from the same period last year 3.09 million Baht or 32.2 % decrease as a result of decreased in loan burden and loan interest rate. 4. Depreciation of 6.76 million Baht decreased from the same period last year 3.46 million Baht or 33.88 % decrease due to some of fix assets having been fully depreciated. Please be informed accordingly. Yours Faithfully, Mr.Upakrom Thaweephoke Deputy Managing Director(Finance and Marketing)