These red plastic wheels have silicone tires and measure 70 mm (2.75″) in diameter, and they press-fit onto 3mm D shafts, such as those on our micro metal 成全电影大全在线观看高清免费播放下载. Additionally, this wheel is compatible with several of our universal mounting hubs, which can serve as adapters for motors with different shafts. This product is a pair of wheels.