The knurling design can expand the side which can heat dissipation contact area so that it can contact more external cold air, enhance the heat dissipation effect, and reduce the internal stress of machining. Besides, upgrading the performance, strength, and durability of the wheel spacers. On the other hand, adding the knurling design on the side enhance the aesthetics of the Mercedes Benz W213 wheel spacers. BONOSS aims to provide more additional functions for the Mercedes Benz W213 spacers, and make the spacers safer, higher performance, and have a better installation experience. This is the reason why BONOSS insists on independent manufacturing and continuous optimization of the design. In addition to practical functions, there is a sense of art.br br Extremely Lightweight Design, Higher Performancebr Forged AL6061-T6 with Tensile Strength ≥ 310MPa, Saferbr Multi-stage Hubcentric Design, More Stable at High-Speed, Saferbr ISO Grade 12.9 Wheel Bolts with Gasket Structure, Strength ≥ 1282MPa, Saferbr Customized Only in 1-3 Days, OEMODM Available, More Professionalbr Over 66 SGS TÜV Test Reports Certificated, More Professionalbr Worry-free 10 Years Warranty, Friendly Customer Servicebr br #mercedeseclass #bonoss #wheelspacers #bloxsportbr br Click Here to get the BONOSS wheel spacers for your Mercedes E-Class W213W214.br 3mm-20mmbr AL6061: AL7075: br 25mm-60mm:br AL6061: AL7075: br Links to the BONOSS Mercedes Aftermarket Accessoriesbr br Find all the BONOSS products you love atbr br Why BONOSS Wheel Spacers Are Perfect for the Mercedes E-Class? - Mercedes Partsbr br Information:br Vehicle: Mercedes-Benz W213W214 E200E300E350E400E450br Product: BONOSS Forged Lightweight Plus Wheel Spacers and BONOSS Forged Grade 12.