Specified and approved by professional captains and guides, Berkleys Pro Spec 100% Fluoro Leader Material delivers maximum invisibility, durability and crimp strength. Excellent clarity makes it nearly invisible. Professional-grade 100% fluorocarbon construction is ultrastrong and abrasion-resistant to ensure lasting durability. Available in clear and special tints to match different water conditions. Sizes: 75-yd., 100-yd. Colors: Blue, Clear, Pink. Berkley Pro Spec 100% Fluoro Leader Material Lb.test Diameter (in.) 20 .018 25 .020 30 .022 40 .024 50 .029 60 .032 Type: Leader Materials.