An economical and smart means to expand the performance of your Loop Opti Megaloop fly reel is to throw a matching spare spool into your boat bag. When fishing conditions change and you need to switch to another fly line, be prepared. An Opti MegaloopSpare Spool can get the job done in a hurry. Machined from one-piece aircraft aluminum Waterproof and salt tolerant Power Matrix drag system to slow down big fish Counter-weight has an O-ring to use as a tippet keeper.