This is a hard EVA original economizer for the Ambassador 5000 series. "For narrow shafts with a spool shaft of 10.4mm" Caution! Please confirm the spool shape. Please check images A and B and specify your choice in a message after winning the auction. Economizer width: Type A 27.5mm Type B 27.0mm By attaching it to the genuine spool, you can create a shallow spool, eliminating the need for backing and reducing weight. Line Capacity: Nylon line: 20lb x 75m PE line: 5 (diameter) x 75m (varies depending on the manufacturer) *For safety, double-sided tape for attachment is included, but it should not slip once the line is wound. (Be careful as it will be difficult to remove if you attach it with double-sided tape) *Please note that we have not confirmed installation on all 5000 series models. *The spool in the photo is not included.