The Truck Hardware Gatorback Denali Text 19”x24” Dually Mud Flaps are designed to fit great on dually GMC Sierra 3500 trucks. The flaps offer 19 inches of heavy duty rubber and weigh in at 9 lbs each. This weight will ensure that they do not sail when you are driving and they do their job. Because of how heavy duty these flaps are we high recommend using the mounting brackets for installation. The heavy duty rubber ensures that there will not be any debris that gets passed these flaps. The Denali text is Officially licensed ensuring it looks perfect and is die stamped on a stainless steel plate with a hand applied vinyl overlay. You will appreciate the attention to detail in these flaps. The flaps include a lifetime warranty on the rubber portion. If the flap comes off the truck or is damaged to due to normal wear and tear let us know and we will send you a replacement piece of rubber at no charge.