This set of spreading vanes is the original equipment component for the metering system of a Sulky fertilizer spreader. The set includes vanes of two different lengths, which are used to control the distribution pattern across the working width. The vanes sit at the outlet of the metering unit and direct the flow of granules onto the spinning disc. Worn or damaged vanes cause uneven lateral spread, leading to streaking in the field. The manufacturer specifies the original geometry to match the disc speed and vane angle required for the spreader's calibrated pattern.