98571 DriftART4 High Concentricity 7075 Alu. Solid Axle For DA4/DA3 -Sandwich nesting structure, stable and accurate installation, high concentricity. -Hollowing and Lightweight design. -Made of 7075 aluminum alloy, wear-resistant and durable. -The CVD cup has two interfaces,compatible with the For DriftART4(DA4) and DA3S. If you buy the corresponding CVD, it can also be used on the DA2 series.