Double HH 86520 Hub X-Series #50 Chain Size Sprocket, 20-Teeth, 4-3/8"X Series Hub Sprocket for use with #50 chain size. With teeth around the perimeter that meshes with a chain, track, or other perforated or indented material. Number of Teeth: 20 Outside Diameter: 4 3 8" Hub Series: X #50 chain size Connect with quality.
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