The RMH 21535312 is a genuine OEM crankcase filter designed specifically for RMH engines. This essential component ensures proper crankcase ventilation, preventing pressure buildup and maintaining engine cleanliness by filtering harmful contaminants. With a height of 51 mm, an outer diameter of 95 mm, and an inner diameter of 51 mm, this filter weighs 0.12 kg and is crucial for extending engine life and maintaining optimal performance.