I have a SteamVac II. I don't think this is an OEM part as it's a bit larger and the caps are different. It works, but in a slightly different way. Also, the lids are unthreaded so they don't screw on like the old ones. They rotate about 1/4 turn. Many say they don't have a pen, and there's no pen in the photo. But the part I received came with a handle, so that was a plus. I've cleaned 2 rooms with it and haven't had any problems with it so far.