These bladders are specially made to fit Wilson footballs to help line up the seams with most all the Wilson football's and will also fit all other full-size non Wilson footballs but might show a slight seem mark that will go away after a week or so. There 3 ply bladders and come with lace to do a double lace and the best that's out there as of now and are new as of last year. these replaced the black ones and are much better and more durable.