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1. Can I get a sample for quality check? A: samples are welcome and we will provide sample to you in 3-5days upon your confirmation. 2. Can you provide OEM or ODM service? A: Our R&D team has more than 12years experience in electric home appliance industry. Our factory can provide OEM &ODM service for e-cigarette. 3. What’s your regular production time? A: We usually need 7-15work days to finish a formal order. It takes 3-5work days to finish a sample order(not including customized version) 4. What certificates do you have? We have CE,FCC,ROHS, certificates for our products. 5. What’s your warranty period? 12-month worry-free warranty and 100% refund guarantee if bad quality.