Description: The mini blinds (1") aluminum no drilling for windows are easy to install. With the plastic tilt bar, the slats rotate 180 degrees to control light, block UV rays and provide privacy in any room. The upgraded materials are very good for home use, workplace, etc. Mounting Options: When installing blinds, a deduction of approx. 1 cm to fit correctly on the window frame. A minimum frame depth of 2.4" is required for inside mount for secure installation. INSIDE MOUNT DIMENSIONS: Step 1: Measure the inside width of the frame in 3 places: top, middle and bottom. Please note the smaller of the 3 measurements and subtract 1cm as individual width before ordering. Step 2: Measure the height in 3 places: left, middle and right. Write down the smallest of the 3 measurements and use the number as your individual height when ordering. Type: Horizontal Blinds, Mini Blinds Features: Light Filtering Material: aluminium alloy. Installation: no drilling required.