1. Product Overview RWF30-118 is an integral one-piece ball-roller composite water pump bearing, full model code explanation: - RWF: Front deep groove ball row + rear cylindrical roller composite integrated structure, higher radial load capacity than double-ball BWF series- 30: Outer ring outer diameter matching reference dimension- 118: Total overall length of the integrated spindle assemblyIt is fully interchangeable with NSK original RWF30-118, specially customized for