Here we have an extra spool (2 available) for a Nautilus NV 11/12 fly reel. The 4.5 in. spool is also compatible with the Nautilus NV-G 9/10 frame, giving the reel the capability to handle 11-13 wt. lines, or if you just want added backing capacity with a 9/10 setup. Spools are pre-owned, but are in like new condition. Naturally, they can be used with both left and right hand retrieve reels. Each spool comes with a Nautilus pouch.