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Chamberlain | Liftmaster | Sears | Craftsman
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- Compatible with all Liftmaster Screw Drive and Low Profile Screw Drive operators (1995-current).
- Compatible with Chamberlain models 4600, 4620, 4640, 9902, PD420, PD460-2, 9950.
- Compatible with Liftmaster models 1000SD, 2000SD, 1000SDR, 2000SDR, 2110, 2220.
- Same as Part number 25A18
- Replaces sprocket coupler on Screw Drive rail assemblies.
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