St. Croix Rio Santo Fly Fishing Rod Made of premium quality SCII graphite Aluminum-oxide stripper guides with black frames Designed in Park Falls and handcrafted in Fresnillo, Mexico Smooth, versatile, moderate-fast action 5-year warranty backed by St. Croix Superstar Service Mid-modulus graphite fiber with a highter strain rate than fibers commonly used by others Most popular material that is lightweight, durable and sensitive, like you would expect from a ST. CROIX rod High-modulus, high-strain graphite fiber Produces extremely light and sensitive rods Similar to the SCV, without the carbon-matte scrim Includes FRS Technology High-modulus, high-strain graphite fiber with carbon-matte scrim Produces lightest, most sensitive and strongest rods The finest blank material, exclusive to ST. CROIX Includes FRS Technology Super high-modulus, high-strain graphite fiber Efficient material adds power with minimal weight Used only to complement other graphite materials, as it is too high in modulus to be used as primary material Includes FRS Technology