1. How many pieces of each set? Including the gift box? 

--  set of 2pcs,  including 1pcs ballmarker & 1 pc cap clip. Individual box by your side.

2. What is the material? Could it be customized?

-- materials could be zinc alloy, iron, brass etc.  It can be customized

3. Possible to get a sample to check quality?  Any extra cost?

-- Of course. Free samples can be shipped to you. But you have to bear the shipping cost

4. If customized samples order, what I should pay? Can refund?

-- You should pay for the setup cost. No problem we can refund if total quantity ups to 10k.

5. How to Pay?

-- You could pay through PayPal, Western Union, T/T