Deep Blue Marine Products Multisystem Adjustable Reel Filler. The interchangeable deep blue multisystem is the next generation in rod holder accessories. Features an easy-to-use swivel mount to fit in any rod holder and folds flat for easy storage. The MS-3 Super spooler holds most any spool from 1/4lb to 5lb. 100% marine-grade polymer construction. Includes Adjustable Reel Filler and rod holder swivel mount.