Sorry for the crappy iphone photo. I thought they were supposed to be a grey color, but they are actually white. These props look very similar to the stock props. Upon closer inspection, these props are substantially stiffer. They've also been redesigned to have more concave on the underside. Sorry, not an aeronautical guy, but that's the best I could describe it. I don't really have an overweight or stability problem with my Phantom, but supposedly these props will gain an additional 2 minutes of flight time. I'm skeptical, but I'm game to try. Hopefully, I'll be able to test in the next couple of days and report back.