Here is the JD parts website, just type 318 into the model finder, then find it in the results, look at the attachments and then once you've selected the blade look at the sectional view. On the bottom you can select parts you want to price but you will have to create a login to the JD website to get pricing. No cost involved unless you order something! http://jdpc.deere.com/jdpc/servlet/com.deere.u90490.partscatalog.view.servlets.HomePageServlet_Alt