20241 , MTX Hornet Brake Disc Solid Wave Type Front. The Hornet Wave keeps you out there at your best. Designed for performance. Using Lightweight induction hardened stainless steel the Hornet Wave discs offers superior strength and durability while using MTXs innovative technology to keep you in control under high stress braking. Constructed using one complete segment of SUS 420 stainless steel, then heat treated to HRC 36+ 2. MTXs Wave technology ensures your discs stay cool through high strain environments. All MTX discs are designed and manufactured with world leading, cutting edge technologies: Precision CNC machined and laser cut technology Japanese SUS 420 Stainless Steel Replacement for Original Equipment High Tech Wave perforated design Optimum heat dissipation Specifications: O. D: 252mm I. D: 109mm Minimum Thickness: 2. 5mm Rotor Position: Front