Feature: 1. Perfect design, exquisite workmanship and high performance 2. Light weight and portable to carry, high quality and durability in use 3. Made of metal with high quality and easy to install on your RC car 4. The coupler increase the vehicle\u0027s stability, cornering speed, and brake efficiency 5. Specially designed for Traxxas Hsp Redcat Rc4wd Tamiya Axial scx10 D90 Hpi Specification: This high quality upgrade part 12mm hex 15mm coupler is designed for Traxxas HSP Redcat RC4WD Tamiya Axial SCX10 D91 HPI. With its terrific quality and performance, it can satisfy all needs of the racers. So come and take it home, to enjoy more fun. Features: Perfect design, exquisite workmanship and high performance Light weight and portable to carry, high quality and durability in use Made of metal with high quality and easy to install on your RC car The coupler increase the vehicle's stability, cornering speed, and brake efficiency Specially designed for Traxxas HSP Redcat RC4WD Tamiya Axial SCX10 D91 HPI Specifications: Item name: 12mm Hex 15mm Coupler Material: Metal Color: Red / Black optional Perfect for: Traxxas HSP Redcat RC4WD Tamiya Axial SCX10 D91 HPI Suitable for: Hub aperture 5mm, Axle screw 4mm Hex: 12mm Length: 15mm 1 set: 4pcs Item Weight: 3.1g / pcs Note: Please kindly note that there could be a few deviation as the result of manual measurement. Thank you Package information: Package size: 10 * 5 * 1cm / 3.9 * 1.98 * 0.39in Package weight: 29g / 1.03oz Poly bag package Package list: 4 * 12mm Hex 15mm Coupler 1 * Spare Parts Package List: 4 * 12mm Hex 15mm Coupler 1 * Spare Parts