These tips are a little larger at the small end than some of the other tips. It barely fits the opening and only if you really work at it.
We have used these in our lounge for a few weeks now. When the black lights are on, these show up very well unlike the others that are solid / opaque colored. The draw is just fine, not restricted at all. They do fit over the metal tipped hoses, but you have to fuss with it sometimes not because of them, but the sizing on the metal tips varies a BIT on the cheaper hoses (even within the same batch...) All in all a quite a good product.