This is a micro-cast spool (custom spool) developed for Shimano Bait Finesse Bait Reel 17 Calcutta Conquest BFS by Avail. Deep groove model MicrocastSpool 17CNQ29R is 10? Designed to make your 12lb line comfortable Line Capacity: 10lb - 50m, 12lb - 40m (Color Lineup) Black, Gunmeta, Red, Champagne Gold (Compatible Models) 17 Calcutta Conquest BFS HG LEFT, RIGHT