We provide 12-month free maintenance. The buyer should return the product in the original conditions to us and should bear the shipping costs for return, If any part is required to be replaced,the buyer should also pay for the costs of the parts to be replaced.Before returning the items, please confirm the return address and the logistics method with us. After you give the items to the logistic company, please send us the tracking number. As soon as we receive the items, we will repair or exchange them ASAP.Normally all linear scale and DRO can be shipped out within 5days after the payment, and we will ship the goods via DHL, FEDEX,UPS or TNT. And we will also ship from EU stock for some products which we have them in oversea warehouse. Thanks!And Please note that buyers are responsible for all additional customs fees, brokerage fees, duties, and taxes for importation into your country. These additional fees may be collected at time of delivery. We will not refund charges for refused shipments.The shipping cost does not include any import taxes, and buyers are responsible for customs duties.