I have some 55mm contrast filters. All are Quantaray. Y2 yellow, YA2 orange(two), and R2 red(two). I bought these a long time ago and do not like 55mm size anymore. Only 3 of them have the cases. I want to trade for B&W contrast filters a different size-52, 58, 67, or 77mm. I'm looking for deep yellow, yellow green, orange, or 25 red. If your filters are larger size, maybe we can trade more of mine for less of yours or something like that. Also I'd consider one of us throwing in a roll or 2 of film to even it up.