One pair of aftermarket slip clutch linings replacing John Deere/Frontier part number 5TIFC711330. These slip clutches are used on many Frontier branded rotary cutters including the RC1048, RC1060 and RC1072. They are also used on some RC2060, RC2072 and RC2084 depending on serial number, Please use your own resources to ensure 5TIFC711330 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.)