1.You are a trading company or manufacturer? -We are manufacturer with more than 13 years production experience, and have our own factory in Taizhou, Jiangsu2. What certificate do you have? -TUV, SGS, and so on.3. Can you provide OEM service? - Yes, welcome.4. Can you send me a sample? Is it free? - Yes, the samples is free, but the courier charge should be on your side5.The price that you offer me, Could be more discount? -It will depend on order quantity.6.Is there any warranty, can exchange it? -Normally our warranty period is three months. If it is quality problem, we support a replacement, refund7.Mode of transportation -By sea or by air8.How about the Delivery time? -Normally 7-15 days after receiving the 30% deposit. Samples will be prepared within 2 Days.