Flat : Y Belt Type : Serpentine Bearing Width (mm) : 24 Bearing Inner Diameter 2 (mm) : 17 This Dayco 89005 Accessory Drive Belt Idler Pulley replaces Murray 209765, Imperial 231105, Duralast 231105, Cummins 3935819, Four Seasons 45981, Hayden 5981, Isuzu 8-10069-950-0, Everco A5497, Ford E9SE-6B209-JA, Ford E9SZ-6B209-A, Ford F4SZ-6B209-A, OEM parts and is perfect for replacement or a performance upgrade.