Dear Sir,I am Isadora Liu, sales manager from Zisen Aoustic Technology Co.,Ltd, China. Glad to know your email from website.From your website I know you are in the acoustic filed. Our company- Zisen Aoustic started acoustic business since 1999. In 2008, we re-organized this company into a professional provider of noise control and prevention solutions with our green, high quality and cost-effective products and professional excellent technical team and EPC service. We have many acoustic products, such as 1.Broadband Engine muffler, Noise reduction muffler , Matrix muffler, Chip muffler, Pipe muffler, etc. for industries.2.Sound insulation door and window for buildings, etc.3.Polymetric Particulate sound barrier for high way, bridge, etc.4.Polymetric Particulate landscape sound barrier for landscape5.Polymetric particulate sound absorber for indoor acoustic insulation, etc.Etc.Till now, our products and solutions are widely used in the fields of petroleum, natural gas, chemical, electric power, metallurgy, transportation, building and municipal administration, such as road barrier, highwey barrier, etc. and distributed to Thailand, Iran, and Indonesia, Pakistan, Rwanda and other countries and regions.We sincerely hope we can cooperate with each other in the near future. If there is any question, please contact me freely by Skype: Isadora.liu or email to isadora.liu at gmail.com.