Kenworth W900 Left Side Window Sill Plate K218850 R391137 *Please Verify OEM Number Before Purchase Heavy Duty Left Side Window Sill Fits Kenworth W900 Models (1981-2018) Direct Aftermarket Replacement For OEM #s: K218850 R391137 Protects Door And Window From Water And Debris Intrusion Tested To Ens... See More