The Ultrasonik Shock Leader material is a very strong and extremely reliable modern monofilament leader material with high knot strength and excellent abrasion resistance. The Ultrasonik Shock Leader complements the Ultrasonik Saltwater Monofilament line and is quickly becoming the distance caster's first option. Excellent value 150m wrist spool containing enough material for 15 shock leads 150m wrist spool High knot strength Super strong Abrasion resistant Clear and orange