|The revolutionary Model 156 Roller System by Ferno allows any stock extended vehicle to carry a variety of equipment so your vehicle is always ready for use. The Model 156 can accommodate caskets, cots and most airtrays. The only modification needed is removal of the bier pins. The Model 156 mounts to the floor and has the same style roller system as the Model 124, yet it can also carry a cot (Model 156 and Model 124 do not have the same mounting configuration). Bier Pins sold separately.