Description: [Function]: The function of the Electric Step Control Box is to automatically extend and retract the threshold of your RV with the control switch and stop the step automatically when it hits an obstacle. [Part Numbers]: Replacement Gear Part Number: 379160, 1101425. Electric Step Control Box Part Number: 909510000. RV Entry Stepper Motor Part Number 676061 214-1001 1101428 379147 366043 369506. [Premium Material Durability]: Premium materials and unique construction methods make our classic electric step controls stronger and more durable. [Easy Upgrade]: The stepper motor conversion kit contains all the accessories you need for an easy one-step upgrade. [Note]: Please make sure the stepper motor control box is compatible with your car before purchasing. Package Contents: Electric Stepper Motor Conversion Kit for Traction A, IMGL Motor, for Step Series 22, 23, 28A, 30, 32, 33, 34, 35, 36, 38, 40 – 379145. Package Includes: 1 * Electric Stepper Motor Conversion Kit without Instruction Manual