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Quoting: H78C12 2 Linn — Roller Chain Sprocket; 78 Chain; 12 Teeth; 1 Row of Teeth; Hardened Teeth; 10.08" Pitch Diameter; C-Hub Both Sides;2" Bore; No Bushing; 2-39/64" Chain Pitch; ANSI Roller Chain; No Keyway; Steel Material

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