Alternator 120 AMP 12V 4″ Dual Foot Saddle K6 Pulley with Isolated GroundAlternator, 604 Series, 120A, 12V, Saddle Mount (Dual Foot), 4in, K6 Serpentine Pulley, Isolated Ground 4″ J-180-Style Mounting; Typical for Caterpillar, Cummins, Detroit Diesel & John Deere EnginesReplaces: 604-120-SR-IGThis product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Specifications:Amperage: 120AVoltage: 12vBox Dimensions: 9″H x 9″W x 10″L WT: 13.35 lbsUPC: 676205750615Brochure (pdf)