Megabass offers all its IS reels (IS63L, IS71HL, IS73C and IS79UC) an optional upgrade to convert them into a bait finesse system (BFS) to cast ultra light lures, with the Megabass - Carrozzeria Custom Parts - HONEYCOMB - IS SPOOL. To achieve this, Megabass has focused on making weight reduction its key design objective. The IS Spool is made of ultra duralumin and laser cut with a honeycomb pattern to shed as much possible material to achieve a mere 10grams, that will ensure that the IS Spool will spin as freely and easily as possible to cast finesse type lures. Type: Reel accessory Material: Ultra Duralumin Weight: 10grams Line Capacity: 7lbs/90m, 10lbs/65m, 12lbs/50m Spool Thickness: 1mm Spool Diameter: 34mm Shaft Material: Stainless Steel SUS304