This is German model 12T, 14T, 16T, 18T type Good heat dissipation, The blade-like reinforcing rib structure design for the surface of brake drum ensures faster air flow when the vehicle axle rotates, enhances heat dissipation and prevents high-temperature bursting. For reliable supply and stock brake drum trailer with wholesale price and professional quality, inquiry now!If you want to know more different types of heavy duty truck trailer parts, please visit our website.