sorry about the lack of information on the web site I got busted up this summer I have been in for a couple different surgery so I haven't got everything up to date yet working on it.the Zero Snow running boards for the Pro-RMK are 7 inches wide up front tapered to 6 inches at to kick up they are made of 4130 chromoly we have two different types of traction for the outer edge self tapping stainless steel screws the other type is aggressive aluminum strip that rivets on.the running boards are $475 they are brand-new item this year so at this point you will probably have to order them direct no dealers have stock on them yet shoot me a message or give me a call if I can help in any other way Diamond S Mfg 435-283-4535
