Door Closer is one type of similar spring hydraulic device. After opening the door, it can automatically closed through spring compression and release. It can ensure the door open or close accurately and timely to the initial position. Our company JIANGYI is specialized in manufacturing glass hardware for more than 20 years, with our precise attitude and friendly service, with pretty competitive price. Our Hydraulic Door Closer and Automatic Door Closer are applicable for wooden doors and glass doors of metal frame and wooden frame. Single ways opening with smoothly movement, hold-open optional. High quality aluminum body with silver painting, or variety colors available. And different installation methods to make different closing power sizes. Then special components through heat treatment to improved it`s hardness.