Two types of installation. Drill-free installation is suitable for smooth walls, and perforated installation is suitable for rough walls,Size:10.9X6.5X4.3 Inch, thickness 0.3MM,Internal size:10.5x6.2 Inch. Suitable for almost all origami paper towels. Dust Cover On The Top -- Dust cover well prevent debris from the air falling on the neat paper towel in wall mounted dispenser.It works great in garage and kitchen or outdoor. Holds a 150-count single stack of Z-fold, C-fold, or multi-fold paper towels (check image above for specifics) Paper towels not included Durable And Sleek,Modern - make of acrylic,it has nice thick and durable construction.Bottom slot is wide,you can easily pull towels out.A nice addition to bathroom kitchen office restroom.