How to choose the size: It is recommended to match the depth of the partition to the length of the bracket to ensure maximum load capacity. Extending the depth of the bulkhead will increase the torque of the support arm. As the torque increases, the load capacity decreases (leverage principle). Complete models and solid support: Models include 200 or 250 or 300 or 350 or foldable tablet holders. 400 or 450 or 490 or 540 or 590 mm to accommodate different sizes! The maximum load capacity is 330 lbs or 150 kg. To increase the load capacity, you can increase the number of brackets between spans. Space-saving: The foldable tablet holder requires only one mounting surface and takes up very little space. You can use them to expand countertops in garages, laundry rooms, kitchens, garages, boats, receptions, backyards, campers, barbecues, trailers, bedrooms, balconies , bathrooms, etc. Folds up when not in use to save most of the space. Easy installation: Even if you are not good at DIY, it is easy to install. The kit includes the appropriate mounting accessories, stainless steel screws and expansion tubes. You just need to make sure that the two brackets are parallel to each other and perpendicular to the wall. Sturdy and durable: Made of stainless steel with good corrosion resistance and to rust. No coating, no spray painting, easy to clean, brushed finish to prevent daily scratches and keep it shiny as new. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.