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Our superior 08B SK2 attachment connecting link is designed explicitly for metric 12
Sprocket Weight: 134
120A19 sprockets with a stock bore comes with a 1-1/4" inside diameter plain hole and can be easily machine bored to custom sizes
Dimension (C): 1/8"
1B124SDS High-Performance Single Sheave, USA Roller Chain 27-Tooth Sprocket Our superior 08B SK2 attachmentThis 1B124SDS sheave features one groove, is 12. 75" in diameter, and is designed to use a SDS bushing. QD (quick detachable) style sheaves offer a wider selection of bore sizes versus a standard "fixed" bore style sheave. Also because they are a two component part if one component fails the entire part doesn't need to be replaced. All of our sheaves are manufactured out of an extremely durable cast iron, are dynamically balanced at the factory, and
