The Strongest Nylon Tippet Material Ever Made Incredible strength to diameter ratio Soft material for high knot strength Each spool has the added bonus of 50 yards of tippet RIO’S Powerflex Plus is changing its name to Powerflex Strong Tippet is the strongest nylon tippet material ever made, with tensile strengths up to 20% more than regular tippet. A highly technical formulation of the nylon copolymer manufacturing process has resulted in this prodigious strength increase, without compromising knot strength or suppleness. Simply put, this is the strongest, most reliable tippet ever made. X Diameter Test Diameter SKU 0X 16.2lb (7.4kg) 0.011in (.279mm) 6-22520 1X 14lb (6.4kg) 0.010in (.254mm) 6-22519 2X 11.2lb (5.1kg) 0.009in (.229mm) 6-22518 3X 9.1lb (4.1kg) 0.008in (.203mm) 6-22517 4.5X 6.4lb (2.9kg) 0.0065in (.165mm) 6-22515 4X 7.5lb (3.4kg) 0.007in (.178mm) 6-22516 5.5X 4.6lb (2.1kg) 0.0055in (.140mm) 6-22513 5X 5.5lb (2.5kg) 0.006in (.152mm) 6-22514 6.5X 3.1lb (1.4kg) 0.0045in (.114mm) 6-22511 6X 3.6lb (1.6kg) 0.005in (.127mm) 6-22512 7X 2.5lb (1.1kg) 0.004in (.102mm) 6-22510