This plastic bushing acts as a bearing surface within the seeding unit, guiding the rotating components that deliver fertilizer. It sits between the shaft and the housing of the metering assembly, reducing friction and maintaining alignment during operation. Over time, wear on the bushing's inner bore causes play in the shaft, leading to uneven product metering and inconsistent application rates. The bushing is molded to the original geometry, preserving the clearance required for the shaft to rotate freely without binding.