Delco 10DN, 10SI, 12SI, 15SI, 27SI/Type 100 Series, CS121, CS130, CS144, and Ford 1G Series ER/EF, 2G Series IR/EF Alternators. ID: 0.669in / 17mm OD: 3.252in / 82.6mm Belt Width: 0.512in / 13mm Thickness: 0.923in / 23.45mm Center of Rear Groove to Rear of Pulley: 0.512in / 13mm Pulley Grooves: 1 Groove Type: V-Groove Nut Recess Depth: 0.177in / 4.5mm Pulley Type: Solid Weight: 1.25 lbs / 0.57 kg.
