10 Tooth Roller Chain Sprocket B Type Hardened Teeth, 25 Chain Sigle Strand 1/4-Inch Pitch, 6mm Bore Black Oxide C45 Carbon Steel with Fasten Screws for 04C Chain June_2023_update NOTE: Many people may think

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10 Tooth Roller Chain Sprocket B Type Hardened Teeth, 25 Chain Sigle Strand 1/4-Inch Pitch, 6mm Bore Black Oxide C45 Carbon Steel with Fasten Screws for 04C Chain June_2023_update NOTE: Many people may think10 Tooth Roller Chain Sprocket B Type Hardened Teeth, 25 Chain Sigle Strand 1 4 Inch Pitch, 6mm Bore Black Oxide C45 Carbon Steel with Fasten Screws for 04C Chain Product Features Size&Package1 4" pitch, 10 teeth, 6mm round bore, more size refer to pics. Package include: 1 x Chain Sprocket, 2 x Set Screws. MaterialMade by c45 carbon steel, the tooth part high frequency quenching heat treatment, high hardness, wear resistance, long service life, easy