r from xinst?Just send us email or call us.2) Do you offer the free sample for testing?Yes, we offer the sample free, but you courier charges.3) How to ship the order?We will suggest you the appropriate way of shipment, by sea, by air or by courier. Of course if you will have your own forwarder, that is no problem.4) Can we trust the quality of product from Xinst?Sure, do not worry abou that. Our quality wills absolutely compliance to the sample we send. If not, we will take charge of that.5) Wh