Injora Rc Hex Hub 12Mm Brass Wheels Hex Hub Extension Hex Drive Adapter For 110 Rc Crawler Axial Scx10 90046 D90 (15Mm)Please check size before purchase, not suitable for trx4 Features The Rc hex hub is made of high quality brass, solid and abrasion proof Heavier weight can lower the center of gravity and improve stability The Spacer fit for 12mm h..