Sigmacigs International is one of the most reputable manufacturer of Electronic Nicotine Delivery Systems . Sigma is the premium brand belong to the Sigmacigs International . 1. Founded in 2013, we have the experience of manufacturing e cigarettes for around 10 years .2. Sigmacigs is a high-tech enterprise focusing on R&D and Designing . 3. Strong R&D strength, perfect quality control system and nearly 300 patents are the solid foundation for Sigmacigs International to maintain its leading competitive position in the global electronic cigarette industry 4. Our pursuit : Responsibility, Undertake, Teamwork, Co-operate, Acquisition, Acknowledge, Innovation, Development . Contact information : Mobile-Skype-Wechat-Whatsapp: +8618589027066