Brand:Ningbo Shenling Model:YTJ031-14 The product brand new Producer:China We also have other good elevator accessory products, such as Elevator Door System Parts. Color:Elevator Door Motor YTJ031-13(Original brand new) Door Motor Drive YTJ031-14(Original brand new) 13 encoder 14 encoder 13 second-hand dismantling no warranty 14 second-hand dismantling no warranty The main function of the elevator door operator system is to open and close the elevator door. When the elevator reaches a certain floor, the elevator door operator system will automatically start, opening the elevator door to allow passengers or items to enter and exit the elevator.