HMGgal
Senior Cook
I'm not sure what the brand name is, but there are so many of them, I don't think it will be a problem to find one. The one I have is stainless mesh, and like the others I've seen, it has expandable/retractable "legs." The legs also have rubberized bottoms to grip onto the edges of the sink. Just give your sink a measure and look at some of the colanders offered on the online shopping sites and you should find a match, even with an uneven sink.
Thanks!