RIO's Hard Mono Saltwater tippet is a very stiff, super abrasion-resistant nylon tippet material. Ideal for casting the largest flies and in tough winds to get the very best turnover. It is available in regular sized spools and guide spools":
8lb (0.010") to 30lb (0.027") - 30 yards per spool
12lb (0.015") to 20lb (0.021") - 110 yards per spool
An ultra-hard, tough nylon tippet. Ideal for large flies and tough winds.