OEG Parts New 2-Groove Pulley Compatible With Delco 10DN 10SI 12SI 15SI 27SI Compatible With 1G Series 2G Series Alternators 1846787, 1964758, 1968354, 1970830. Condition: New; Rotation: BI; Pulley Class: V2; Pulley Belt Width: 10mm; Pulley OD: 66mm; Shaft OD: 17mm; Mounting Hardware Included: No; Number of Pieces: 1; Country of Origin: CN; Notes: Machined pulley cut from cold rolled steel.