How to use Scientific Anglers Regulator Spool

With Original Case Reel Line. The item Scientific Anglers Fishing 4 Piece Fly Rod 9′ #6wt. It is a 9′ rod #6 wt. Scientific anglers fishing 4 piece fly rod 9′ #6wt. with original case reel line this scientific angler, 4 piece fly fishing rod and reel is in very good condition, as it has never been used.