This is an automatic door closer, made of carefully selected materials, with excellent performance and , and can serve you well. You can follow the dormitory door, room door, fire door, etc., to automatically close the door for you, efficient and practical. Features - Color: Black. - Material: Stainless steel, iron, nylon. - Size: About 11.70X3.00X2.50cm/4.60X1.18X0.98inch. - and good craftsmanship ensure its durability and practicality. - door closer solves the bad habit of forgetting to close the door when out. - It can effectively reduce the door closing buffer force and prevent door damage. - It can be used , school, dormitory, shopping mall and other places. - Assembled by double springs, strong force, suitable for various types of doors. Package list: 1 closer 4 x mounting screws 1 x auxiliary lever