these heavy duty ball cups from rpm are available in a variety of awesome colors guaranteed to enhance the look of your rc vehicle!!!they virtually eliminate popped ball cups!no matter what kind of punishment you put these ball cups throught they totally eliminate annoying distorted ball cups which can become tight and bind important steering and suspension components that rob your rc of its full performance potential!! these rpm ball cups are an inexpensive way to ensure that your rc's steering and supension is working at its full potential at all times!!rcmart.com has a great selection of upgrade parts from a number of the top manufacturers in the rc industry that wiil help you eliminate these and other pesky bugs that you sometimes run into in this great hobby that we call rc!!rcmart.co..