Double HH 86518 Hub X-Series #50 Chain Size Sprocket, 18-Teeth, 3-7/8"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: 18 Outside Diameter: 3 7 8" Hub Series: X #50 chain size Connect with quality.
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