Step1 Placing the window frame in the hole, then adjusting the access position, and placing the positioning air cushion between the window frame and the wall as shown in the left figure.
Step2 Pressing the charging pump manually.After the air bag inflates into a proper size, adjusting it according to the door and window until the installation position of the door and window meets the requirements.
Step3 After using the solid window frame, pressing the air release valve to make the air come out, then take out the air cushion, and seal the doors and windows.