【MATERIAL】Smooth tube body is made of high quality aviation aluminum and electroplated iron shaft,the silver appearance is smooth and delicate 【ADJUSTABLE SPEED】Adjust the end screw of the door closer tube body to change the closing speed 【SIZE AND WEIGHT】All length 13 inches, tube body length 9 inches, carrying door weight 55 to 110 LB 【EASY INSTALLATION】Use the screws included with the package to install,fully open 90 degrees,just slide the metal card installed on the movable shaft inside 【PRODUCT USE】Screen door closer silver applicable to medium or light windproof doors, suitable for wooden or metal outer swing doors Dluno 2-Pack screen door closer