DescriptionThe Omni Spool Arbor Spacer is what many of you asked for when the first Omni Spool fly line storage system became available. Widen the inner arbor of your existing Omni Spool by simply snapping in the Omni Spool Arbor Spacer. Increase retrieval rate, reduce memory on your stored fly lines. Quicken the pace of switching lines from reel to reel on the water as well. Two sizes included in pack.