This is an original hard EVA economizer for the Ambassador 5600. It is for Ultra Cast spools (shaft diameter 14mm). 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-gauge x 75m (varies depending on the manufacturer) *For safety, double-sided tape is included for installation, but it should not slip once line is wound. (Be careful as it will be difficult to remove if you attach it with the double-sided tape) *There may be slight variations due to being handmade. *Please note that we have not confirmed compatibility with all 5000 series reels. *The reel and spool in the photos are not included.