This is an optional set of two Tekno RC NB48 2.0 Rear Suspension Arms, intended for use with the NB48 2.0 1/8 Competition Off-Road Nitro Buggy Kit. These arms are made from a stiff composite material and are intended to be used in hot weather conditions or any time a more direct feeling is desired to sharpen up the handling. These are recommended for temps above 95 degrees Fahrenheit or 35 degrees Celcius.