This Is The RPM Losi 1/4" Diameter Delrin Pivot Balls (12). rpm 73181

Put your car on a diet with RPM Delrin® pivot balls! They come in a set of twelve and are a great way to get rid of unsprung weight. Seven of our Delrin® balls equal the weight of one stock steel ball! Four balls equal one aluminum ball! They are lightweight and completely rustproof