Liftmaster Chamberlain 41A5585-1 Estate Gear & Sprocket Assembly is compatible only with Chamberlain Estate Series chain drive garage door opener units. The following models are Chamberlain Estate Series models - PD752, PD752D, PD758D,PD758S - all model numbers may not be listed here. Check the parts list in your manual. This kit includes all bearings, fasteners and installation instructions.
