Raboesch 7 Blade Left Handed Submarine Prop 7BL-55-L-M4MS propeller series 185 7Bl 55 L M4Raboesch precision ship screwsManufactured in the Netherlands from high quality brass, these propellers are silver soldered and pressed into their final shape in special dies. This achieves a particularly high level of precision and smooth running of the propellers. The enormous selection of different screw types and sizes leaves nothing to be desired. For Raboesch propellers, the direction of rotation is specified