black rubber spacer on ECX aluminum shock shaft

[Joshnewb]

what is the exact name (even better a part #) for the black rubber spacers on the shaft of the ECX aluminum shocks?
And, where can i get more?

thanks

 

[i_r_beej]

It's called a bottom-out bumper. You can't buy just that part. I use "cheap" Associated (#5407) orange o-rings. They're stronger than the stock black rubber bumpers and perform as needed. They're about 2mm thick.