The 3-pack is an extreme value; it includes one reel and two spare spools in a nylon carrying case all for around the price of one reel and one spool. This product offers beneficial interchangeability at ease for the multi-faceted angler. ** Liquid S Spools also fit Remix HD S and non-HD Remix S Reels ** ** Not compatible with previous generation Liquid and Remix** SPECS SIZE DIAMETER WIDTH WEIGHT ROD WEIGHT MAX LINE BACKING CAPACITY -3+ 3.35" 1.00" 4.20 oz 2.3.4 WF4 100 yds 20# -5+ 3.65" 1.00" 4.60 oz 4.5.6 WF6 100 yds 20# -7+ 3.90" 1.15" 5.20 oz 6.7.8 WF8 200 yds 20# -9+ 4.45" 1.25" 6.70 oz 8.9.10 WF10 250 yds 30# ADDITIONAL INFO Format: Large ArborMaterials: Pressure Cast Aluminum Frame and SpoolFinish: Polyurethane Case and SpoolDrag: Sealed Conical Drag