LEGO piece I.D help.. (Harry Potter?????? )

Hi all

Recently got a 10kg lot from a garage sale (SCORE!!!!) and amongst it were instruction booklets for 8 different Star Wars models. they are no problem, however there are some other pieces and colours I have never seen before.

These...









The ring section is just a smig bigger than a 50c piece.



There are quite a few Harry Potter minifigs in the lot, brooms, and castle doors etc, so I may make the assumption that these are from a 'H.P" set, however I can not find a reference to them.. My Daugther wants to find what sets in H.P we have so she can build them.

They also resemble a basketball hoop??

Many thanks!

Adam.

there should be a parts number on it (eg:3*** or 9**** its found on the under side of the brick/ect ) go over to bricklink.com and do a item SEARCH that's the best way to find what set it was from.

According to BrickLink, in Dark Grey, that piece (43373) only came in one set: 'Quidditch Practice'

http://www.bricklink.com/catalogItem.asp?S=4726-1

Do the figs/other pieces match those in the set?

Thanks so much for the replies, the piece number only reads '433' then a moulding mark obscures the rest.

Just looked on Brick Link, and the 3 x mini figs, and many of the parts we have, so I think you guys nailed it

Once again, thanks you, I will use bricklink for I.D from now on.

Thanks again!

Adam.