These Car Carrier Pylons are used with Miller Century, Champion, Challenger, Holmes, and Vulcan Rollbacks. They fit 10, 12, 15, and 16 Series beds. These deck mounted pylons come in a variety of heights from 38″ to 68″. Car Carrier Pylons are commonly used as cab protectors. See application chart under the brochures tab. 38″ does not have middle bars. 42″-68″ has the middle bars. Cab Protector for Miller Century, Champion, Challenger, Holmes, and Vulcan Rollbacks Fit 10, 12, 15, and 16 Series beds Deck Mounted Heights from 38″ to 68″ Painted black Includes safety chain tie back Hollow tube for wiring