This is a brand new Ford OEM belt idler pulley for 6.0L 8-cylinder diesel engine with dual HD alternators. Pulley is grooved. It appears it will fit the following:
2009 FORD E350 SUPER DUTY
2004-2010 FORD ECONOLINE E350
2003-2007 FORD F250 SUPER DUTY
2007 FORD F350
2003-2006 FORD F350 SUPER DUTY
2003-2007 FORD F450 SUPER DUTY
2003-2007 FORD F550 SUPER DUTY
2004-2007 FORD ECONOLINE
Brand new in the box. Please check with your dealer to be sure this will fit your vehicle! We are not experts!