Dear Sir or Madam, We can supply the Patent product: constant magnetism retentivity ac contactor and we are writing to you in the hope of establishing business relations. Our ac contactors have 7 advantages: 1.electric power saving, annual consuming capacity is only 4kva to 8 kva, it is our pride; 2.good environment-protection effect; 3. long life; 4.strong adaptability; 5. high power factor; 6.universal and compatible function; 7.long using life. The most advantage is it cost only 40 C -80 C in annual year, the cost of power normal contactor cost in one year just can buy one new contactor. It is free to use after buying. We can save you cost, aren抰 you interested? We will strengthen the cooperation with our valued customers. We sincerely hope to become your stable, reliable and long-term supplier. We will enjoy every development in every step together. If you want to get more information or purchase it, please feel free to contact us. We will pay our high attention to you.