Yes. It is the pulley assembly. You definitely want a new one of these if you are replacing the TB.
A new item 10 adjuster spring is nice to have and cheap too. You rely on the spring tension to set the TB tension when following the service manual instructions. If it is original, your old one may have lost some of its stiffness and you don't want too loose of a TB. Not too tight and not too loose.
I also recommend a new item 15 rubber washer to seal out contaminants once you place the TB covers back on.