Stihl 021, 023, 025, Ms210, Ms230, Ms250 Crankshaft Bearings & Seals Replaces Stihl ,9503-003-0340, 9638-003-1581, 9639-003-1585
- Wide temperature range Mobil Polyrex EM2 (-40 to +350 degrees) lubrication
- Noise tested before and after lubrication
- Passes V2 noise vibration standards for smaller bearings and V3 standards for larger bore
- Finely honed superfinished raceways for long life and low noise
- Meet or exceed ABEC 3 tolerances for high quality level