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Quoting: 50FB20 1 Linn — Roller Chain Sprocket; 1" Bore; 50 Chain; 20 Teeth; 1 Row of Teeth; Hardened Teeth; 4.321" Outside Diameter; 3.995" Pitch Diameter; B-Hub One Side; Finished Bore Mount; No Bushing; 5/8" Chain Pitch; ANSI Roller Chain; Keyway; Steel Material
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