This project is a car auxiliary ball made of ABS material. It is durable and practical. It can provide convenience for your car work and make your driving easier and more worry-free. With excellent design, the auxiliary sphere of the can rotate at will, helping you to save energy better. This is a great auxiliary device that will win your love very well. Features -Color: Black. -Material: ABS. -Size: About 6.30X5.00X5.00cm/2.48X1.97X1.97inch. -Preferred materials, good , safe, durable and practical. -The ball can reduce the turning radius, suitable for beginners, and can better driving safety. -Safe and stable, the spherical surface is flexible, so that your is no longer heavy and provide you with relaxed driving experience. -Universal design, suitable for most vehicles, you can use it with peace of mind. -You can buy this and practical car assist ball at an . Package list: 1 x knob