The HI-SEAS 300 Yard Grand Slam Fishing Line Spool is an extra strong, 100% copolymer with fluorocarbon outer coating. The line is virtually invisible and can be used in any water conditions. It is a top choice when visibility is a concer, such as fishing in clear shallow waters or in top water. Made from the highest quailty copolymer, grand slam fluorocarbon coated is extremely supple and east to cast using bait casting and spinning reels. The line is ultra manageable, easy to knot and delivers high knot strength and abrasion resistance.