This is the Traxxas Wheel hub, splined, 17mm, 6061-T6 aluminum (blue-anodized) (4)/ screw pin, 4x13mm (with threadlock) (4) (for 6mm axles). This is Traxxas part number 6469
Part Number: 6469 / TRA6469
More detail coming soon! Please check your vehicle manual to confirm vehicle fitment, or contact us if you have any questions.