Adavanced logistic system assures on-time delivery, also advanced payment(T/T, D/P, L/C, PayPal,Draft, Westernunion) make the funds arrive easily and quickly.Items covered by valid patents are not offered or supplied for commercial sale. The patent position should be verified by the buyer. Products currently covered by valid U.S. patent are available for R & D use . This list is not all-inclusive. For additional products, please contact our office. Any enquiry, please feel free to contact us for details by the following: Tel +86-755-26879710  E-mail:  1537299139@qq.com