Hereby we promise: Hardness tester manufacturered by us is approved national standard and ASTM standard, and are strictly tested before delivery. We insist on service standard of “full aspect, high quality, fast response” We are aiming at customer’s satisfaction Quality of Products: 1. We manufacture and test strictly according to related products standards and record the test result. Also we make number for each machine and make file for them in order to check in the future 2. All of our products can be tested by the third authoritative party. Also you can entrust us to make third party test(Test Institution: Shanghai Institute of Measurement and Testing Technology), charges is not include. Lead Time: We will delivery goods according to contract. If customer have special reseaon need us to delivery goods in advance, we will try our best to adjust production in order to meet customer’s requirement. After-Sales Service: 1. High efficient service: when there is any problem of your machine, you can contact us, we will reply you within a certain time. 2. Free replace and maintance service: we provide to replace new machine if there is quality problem within 3 months and free maintance service within 1 year. 3. Return visit: we supply return visit service in a certain time. 4. Free update service: we supply free update for software to keep our equipment keep at high level 5.Supply of accessories: we supply corresponding accessories and related equipment. 6. Final interpretation of this promise is owned by us.