9,000 to 20,000LB Axles (4 Inch Wide Springs)

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9,000 through 20,000LB Axles only These axles use 4 Inch wide springs with 1 1/4 Inch I.D. bronze (RNK) bushings Left and right springs may be different on 2000 series with 18,000 or 20,000LB axles

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