12-inch-black-delivery tool for free(12寸-黑色-送工具) 14-inch-black-delivery tool for free(14寸-黑色-送工具) 16-inch-black-delivery tool for free(16寸-黑色-送工具) 18-inch-black-delivery tool for free(18寸-黑色-送工具) 20-inch-black-delivery tool for free(20寸-黑色-送工具) foot brace spare screws(脚撑备用螺丝)

12mm upgrade thickening [built-in thick spring] + screws(12mm升级加厚【内置厚弹簧】＋螺丝) 12mm upgrade thickening [built-in-thick spring]](12mm升级加厚【内置-厚 弹簧】) 12mm upgrade thickening [built-in-thin spring]](12mm升级加厚【内置-薄 弹簧】) [built-in spring]-old(【内置弹簧】-旧款) upgraded version [external-thickened spring] 12.mm(升级版【外置-加厚弹簧】12.mm) [external-spring]-old (thin)(【外置-弹簧】-旧款（薄款）) foot brace thickened spare screws(脚撑加厚备用螺丝1个) i(I)