For sale is a Canon genuine tripod mount ring/collar A(W). This fits Canon 70-200f/4, 300f/4, and 400f/5.6 according to the box. I used this a couple of times on my 70-200f/4 (non-IS).
The condition is mint, no scratches, no paint chips, etc. I still have the original packaging. Like I said, I hardly ever use this. Just want to unload some stuff off.
Asking $100 Paypaled and shipped (48 states, verified address only).
Please note that there is A II or A 2 mount ring. Mine is A version. According to B&H website, A2 collar fits both 70-200f/4 IS and non-IS. I cannot guarantee if mine fits on a 70-200f/4 IS. Please do your own research.