1) The first cooperation, we need to charge the right amount of sample fee. Meanwhile, if your order quantity more than 80% of the total number of new samples, We can refund the sample charge in full;if not,only refund the individual sample fee.  If we has samples in stock,we will send you for free.Freight fee shall be borne by you.

2) The long-term cooperation,Annual purchase amount up to $300000, we can provide free samples to you.