MACHINE SPROCKET COMPATIBLE WITH MODELS: 515 605 610 650 655 700 805850 855 MAC 1-10 THROUGH 10-10 PRO MAC 55 SP-70 TIMBER BEAR 3/8" 7 TEETH INNER HOOK: 84.5mm Bore diameter: 16mm Overall height: 33.5mm SELF-ALLINATING RING: 68210 ROLLER CAGE: 11893 MCCULLOCH CODE: 68209X ORIGINAL CODE: AT