The Nest Cat Bed offers three different shelf types to choose from and a variety of faux fur plush pads and stain colors. Its frame is made from solid bamboo with hidden steel brackets. The front of the bed has a stylish Curved Ledge. This attachment connects to a variety of our shelves to transform them into comfortable cat beds. The Ledge creates a secure barrier for your cat to lean against while keeping the sides open for a cat to lounge out of. We’ve found that our cats prefer having the Curved Ledge to brace their feet against or to look over while feeling more hidden lounging on the wall. The Curved Ledge is an attachment that connects to a variety of our shelves to transform them into comfortable cat beds. This product can be mounted onto walls with any stud spacing. As long as one mounting point is installed into a stud, the second mounting point will be secure using drywall anchors. Sizes Compatible with 16” Spacing - 18” Solid Shelf spans 2 studs 34” Solid Shelf spans 2 studs 34” Escape Hatch spans 2 studs Sizes Compatible with 24” Spacing - As long as one mounting point is installed into a stud, the second mounting point will be secure using drywall anchors. 34” Solid Shelf spans 1-2 studs 34” Escape Hatch spans 1-2 studs