k3 double tube black(K3双管黑色) k3 double tube black and blue(K3双管黑蓝) k3 double tube white and blue(K3双管白蓝) k3 double tube white powder(K3双管白粉) generation ⅰ black(一代黑色) generation blue(一代蓝色) generation green(一代绿色) generation pink(一代粉色) generation gray(一代灰色) generation red(一代红色) 2nd generation black(二代黑色) second generation blue(二代蓝色) second generation green(二代绿色) second generation pink(二代粉色) three generations folding black(三代折叠黑色) three generations folding blue(三代折叠蓝色) three generations folding green(三代折叠绿色) three generations folding pink(三代折叠粉色) three generations children black(三代儿童黑色) three generations of children blue(三代儿童蓝色) three generations of children green(三代儿童绿色) three generations of children pink(三代儿童粉色) new six-generation folding black(新款六代折叠黑色) new six-generation folding blue(新款六代折叠蓝色) new six-generation folding green(新款六代折叠绿色) new six-generation folding pink(新款六代折叠粉色) new six-generation folding black and white(新款六代折叠黑白)

s/m(S/M) l/xl(L/XL) xs(XS)