1、Hex hub adapter extension, fit for SCX10 VP RC car 1.9/2.2inch wheel. 2、Special designed for enhancing wheel safety and ensuring evenly force. 3、Made of quality metal material, durable, wear-resistance and corrosion resistance. 4、Easy and convenient for installation, excellent and stable performance. 5、Wonderful replacement for the old or broken one, directly fitment. Features: Hex hub adapter extension, fit for SCX10 VP RC car 1.9/2.2inch wheel. Special designed for enhancing wheel safety and ensuring evenly force. Made of quality metal material, durable, wear-resistance and corrosion resistance. Easy and convenient for installation, excellent and stable performance. Wonderful replacement for the old or broken one, directly fitment. Specifications: Condition: 100% Brand New Material: Metal Color: Red Optional Size: 6mm, 9mm, 12mm, 15mm, 18.4mm, 22mm Thread diameter: 3mm / 0.1in Wheel hex: 12mm / 0.5in Height: 6mm / 0.2in, 9mm / 0.4in, 12mm / 0.5in, 15mm / 0.6in, 18.4mm / 0.7in, 22mm / 0.9in Center hole diameter: 6.7mm / 0.3in Available for VP SLW/ OMF Method: combination use with SsZ hub Use six 4-40 screws to attach to the hub VP combiner size: 350: Approx. 8.83mm 475: Approx. 12.13mm 600: Approx. 15.33mm 725: Approx. 18.54mm 850: Approx. 21.85mm Hex connector position depth: 4mm (not counting the outer edges), basically, each value is off by 3mm 350 or 475 is suggested for SCX10 second-generation frame/Rippers 600 is suggested for SCX10 generation frame 350 in front and 725 or 850 in back is suggested for snowman 225 is suggested for TRX4 225 or 350 is suggested for Vs4-10 Package List: 4 * Hex Hub Adapter