CENTURY CLUTCH BELL & LINER includes 2 bearingsUse on: Hawk Pro Helicopter Kit [CN1000C] (replacement part) 5-Blade Electric/Nitro 600 size Scale Mechanic [CN1000S50-5] (replacement part) 4-Blade Electric/Nitro 600 size Scale Mechanic [CN1000S50-4] (replacement part) 3-Blade Electric/Nitro 600 size Scale Mechanic [CN1000S50-3] (replacement part) 2-Blade Electric/Nitro 600 size Scale Mechanic [CN1000S50-2] (replacement part) Century 50 size ARF Scale Mechanics [CN1000S-50] (replacement part) Century 30 size ARF Scale Mechanics [CN1000S-30] (replacement part) Hawk Sport (replacement part) Hawk IV (replacement part) Hawk III (replacement part) Falcon III (replacement part)