Alternator 120 AMP 12V 1-2″ Single Foot Spindle Mount Dual Vee Pulley with Isolated GroundAlternator, 621 Series, 120A, 12V, Spindle Mount (Single Foot), 1-2in, Dual Deep Vee Pulley, Isolated Ground 1″ Motorola-Style Mounting; Typical for Westerbeke, Lehman, Hino & Pathfinder Engines 2″ Delco-Style Mounting; Typical for Volvo Penta (Gas & Diesel), John Deere, Perkins, Mercruiser, Pleasurecraft, Crusader, Indmar, Marine Power & other GM-based EnginesReplaces: 621-120-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 10″W x 10″L WT: 13.6 lbsUPC: 676205131087Brochure (pdf)