Dog Door for Sliding Door Two-way Pet Door Pet Supplies Two-way Free Access To Cat and Dog Sliding Door Aids material: plastic Size: 250x140x140MM 1. Install the push door first Confirm the height (head) that the pet can push the door to determine the position to install the door pusher. 2. Let pets practice Before pasting, take your pet to practice the action of pushing the door 3. One side of the circle is pasted on the door, and the other side is pasted on the door frame or wall. Before pasting, you can use a hair dryer to heat the glue surface to increase the viscosity. 4.The other is glued to the door 5.The elastic rope can be adjusted in length and elasticity as needed, and the excess rope can be wrapped around it. Reminder: It is recommended to use it at the beginning, and the elastic rope should be loose, so that the pet can complete the push door action with confidence. 6. There will be gaps in the door frame after installation. The size of the gap is determined according to the style and process of the door frame, which has little effect on air leakage.