This is an unused diagonal which came with a C11 originally, but I chose to use a refractor style diagonal instead of the standard threaded ring variety. I'm selling it only because I made the mistake of placing it on my inventory list, which means I am subject to California use tax if I dare to use it or fail to sell it.
I'm entertaining offers beginning at $99. Shipping and handling should be added at the fixed rate of $7 for continental US.
Please use Paypal as I do not have time to wait a half hour in line at the bank.