GIOVINE MACHINE WORKS AND CYCLE we manufacture most of our parts in house. You will find that our parts are above Quality standard's we take Quality very serious so if you see something in your part that isn't right please let us know so we can correct the problem. And besides Quality you will be glad to know we only use the best materials in our machining proscess and it is all certified before we purchase it. That is why you will find a copy of the certifacation in with your purchase. You may also like to know that we do regular calabrations of our equipment and tools so when you recieve a part from us you can be sure that it has been machined correctly. Also we do custom machining for our customers so if you need something done just give us a call or email us for a quote. Thank You From All Of Us At GIOVINE MACHINE WORKS AND CYCLE