One pair of aftermarket slip clutch linings replacing John Deere part number W34913. These slip clutches are used on many popular John Deere branded equipment including rotary cutters, tillers, spreaders and many others. Please use your own resources to ensure W34913 is the correct part number for your application or contact us for assistance. These disc are 91 mm ID and 150 mm OD. (roughly 3.5 inches ID and 6 inches OD.)