12mm aluminum wheel hex drive hub adaptor (4p) & m4 locknut (4p) rc model car parts actruck <p><b>specification</b></p> <p>color: titanium</p> <p>material: aluminum alloy </p> <p>hex dimension: hex 12mm</p> <p>thickness:6mm</p> <p>axle hole diameter:4mm</p> <p>axle thread: m4</p> <p></p> <p><b>package include:</b></p> <p>4x wheel adapters</p> <p>4x m4 locknuts</p> <p>4x pins</p>