This product is a set of four spools of fluorocarbon fishing line. Fluorocarbon fishing line is a high-quality, durable line that is ideal for fishing due to its strong, abrasion-resistant properties. The fluorocarbon material also has a low water density, making it less visible to fish and increasing chances of a successful catch. With four spools in the lot, anglers have plenty of line to last them for multiple fishing trips.