Chain Drive Sprocket- 37559R.S

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This Chain Drive Sprocket sits on the shaft on top of the power head. The chain goes around the sprocket and the teeth on it grip the chain so it stays on track. This is used on m ultiple Genie model garage door openers that have the chain drive rail system. (See below) Compatible with Models; 1028, 2028, 1128, 2128, 3020H, 3020HB, 3024, 4024, 3022, 4022, ChainMax 1000, ReliaG 650, ReliaG 850 If you do not see your model on this list and have questions please contact Genie for compatibility questions Genuine Genie Replacement Part Show more