I would avoid the black rubber ones because they smell really bad. I had a set of 20lb ones and had to give the away because I couldn't stand the smell of the rubber. I have just the metal ones (some light colored and some dark). You may want to go and look for your self because the handles are different depending on what you get also. Some have straight textured handles and others have smooth, curved ones that fit your hands differently. I usually get mine at Target/Walmart or a new/used sports store where I live. I don't care about used dumbbells, I just clean them off first. That's also where I got my ez curl bar and a lot of plates for real cheap.