Sink: When tested in my game, it obviously works on this set. I found it to work with every EA counter, but none of the CC counters except this one. I should mention I only have 2 CC counters in my game. However, another tester found that it also worked with EA counters and many of her CC counters.

Terrarium: It is about 1800 polys. If that is too high for you, it is clearly labled and easily deleted.

Counters: There are two - one with drawers and one with doors. As usual, they are only available as Sim3packs, but everything else is package format if you so choose.