Alternator 250 AMP Kit 12V 3.15" Dual Foot Saddle K6 Pulley Regulator & Temp Sensor. Kit Includes: XT-CR-250-K6 Alternator, MC-618 Regulator, Temperature Sensors & mounting hardware. XT Series Alternator: 250A, 12V, Saddle Mount (Dual Foot), 3.15in, K6 Serpentine Pulley, Case Ground, 4" J-180-Style Mounting; Typical for Caterpillar, Cummins, Detroit Diesel & John Deere engines. Product details include Amperage: 250A and Voltage: 12v. Item Dimensions (L x W x H): 14 x 11 x 11 inches. Item Weight: 21 Pounds. Material: Plastic. Package includes alternator, regulator, temperature sensor(s) and mounting hardware.