Impala Bob's offers these super premium ''Authentic'' window weatherstrip kits, not the cheaper ''replacement'' style kits that the other guys carry. Ours feature correct and important details, such as plastic rub blocks, round beads with smooth round ends, precision bends, and special rivets. These are the ones that we use on our own cars, but it's up to you. Do you want to skimp and save a few bucks? Or do you want to put the best on your ride? It's all in the details that you'll notice every time you get in and go for a drive.