Yes, Sample order is available for quality check and market test .But you have to pay the express cost. 2. What’s delivery time? It usually takes about 3-5 working days for small order and 10-15 days for big order . 3. What’s your payment terms? We usually accept all kinds of payment terms .Such as T/T,L/C, Western Union.Cash. 4. What’s your warranty terms? We offer 12 months warranty time . 5. Do you have the products in stock? Depends on your request ,We have standard models in stock. Some special products and big order will be newly produced according to your order . 6. Can I mix different power in one container ? Yes ,Different models can be mixed up in one container ,even one order . 7. How does your factory do the quality control? Quality is priority ,we always attach the importance to quality control from the beginning to the end of the production .every product will be fully assembled and carefully tested before packing and shipping . 8.I would like to know if you have a partner for export? Yes .HANTANG have the right to export and can sell product all over the world . 9.How can I trust you ? The core of WENZHOU hantang is honesty and loyalty .our company has been audited and approved ISO9001,ROSH. Assessment report will could be sent to you by e-mail .also .we are the alibaba’s gold supplier since 2008.Now we have clients all around the world .