This Freightliner / Thomas Bus Radiator has a plastic tank and an aluminum core. It comes with an oil cooler and without a frame. It has heavy duty bottom tank construction and durable heavy ribbing ****It comes with large bolt & nut design On Top and bottom.**** (#43620P has bolt and nut design on bottom only. 43173P has small holes on bottom and large bolt & nut design on top) Fits: 2010 & newer models. NOTE - You can reuse OE frame for 2010 & newer models.