This is a replacement Team Associated Large Nylon Body Mount Washer Set, and is intended for use with the RC10T, GT, T2/3, and TC4. These washers will help to prevent your body from cracking. With minor modification so they will fit over the body posts, these can be used on a variety of 1/10 scale vehicle bodies.
Team Associated Large Nylon Body Mount Washer Set (4) (RC10T, GT, T2/3, TC4)
I used these instead of the regular traxxas body washers and I am impressed by the quality. It is much thinner and smaller than the traxxas body washer. The holes were smaller so I just had to dremel it to be bigger. However, I would recommend these if you need body washers quickly