Maxxon Outfitters SDP Spare Spool - The SDP is fully machined, built specifically to excel in the harshest coastal, saltwater conditions. Hard-coat-anodized, and smoke silver finish protects it from the elements. Numeric TRAXX caps now pull double duty. 1st and foremost, they secure your spool to the reel's frame without worry of losing them thanks to the o-ring mounted on the inside. Secondly, they give you the best way to keep track of what weight line you have on each spool. No more stickers to fall off or marker that vanishes. These interchangeable numbered caps stay with the spool so you can be sure what line weight you put on there last. Features: CNC-Machined 6061-T6 Aluminum Hard-Anodized Design Large U-Shape Arbor Spool TRAXX Numeric Spool Tracking System (2pcs) Converts for Left- or Right-Hand Retrieve Manufacturer's Lifetime Limited Warranty *Spool Only