OMPHOBBY M4 Helicopter One Way Bearing OSHM4099 Sale! from 2289 /per Qty. Add to Cart This is a replacement one way bearing set for the OMPHOBBY M4 Helicopters Contents HF0812 One way bearing Φ8*Φ12*12-1MR128ZZ bearing Φ8*Φ12*3.5-1MR148ZZ bearing Φ8*Φ14*4-1 Qty available:1 SKU:OSHM4099