TKR0011 is a downflow radiator for the Kenworth C500, model years 2007 to 2026.
The core measures 44.125" high by 41.0625" wide, 2" deep. It has a 2.5" inlet at the right and a 2.5" outlet at the left. There is no integral oil cooler and no filler neck.
It replaces 30 OEM and aftermarket numbers, among them 650015, 650015AP, 650015PT. Searching any one of them will find this part.
On radiators the inlet and outlet positions, and whether the unit carries an oil cooler, decide interchangeability more often than core size does. Two radiators with identical cores are frequently not interchangeable.