So, is there a difference in spec between the black and silver SRAM powerlinks? I bought some silver powerlinks off of eBay... at least I thought they were silver powerlinks since the listing said silver AND the picture was silver! What I received instead were the black powerlinks. When I told the dude who sold them that he sent the wrong ones, he said they're the same. I am fairly certain that's a load of... , but I'd like to know for sure before telling him so.