The Hatch Professional Saltwater Series Monofilament Leader is manufactured using the highest grade of Nylon Monofilament available. Hatch monofilament is given an exclusive surface treatment to provide smooth texture, reliable diameter measurements, and enhanced UV protection. The superior knot strength, excellent presentation, and durability of this Monofilament Leader material makes it the ultimate choice for big game leaders. Medium – Hard mono is ideal for creating floating leaders, shock sections, and larger diameter butt sections. Available in 50 meter spools only.