Sir International, one of the earliest E-cigarette manufacturers in China, was established in 1987. Due to our primary focus on innovation and invention in 2007, our E-cigarette models are quite popular in North America and the European Union. We uphold the highest quality standards -- therefore, all our products must pass CE, RoHS and SGS certifications and meet the international environmental management system's rigorous ISO 14000 standards.We have a big research and development team, which focus on creativity, reliability and delivering the top quality product to customers.