Easy to Install: Four pre-drilled holes in the dome make it easy to attach securely to shelves. Note: Screws not included. Please check the size before buying. Outer Dia: 12.6". Inner Dia: 11.8". Replacement Part: The small capsule part is great for replacing the inner nest with a standard diameter hole, providing ample space for your cat. Compatible with cat trees, cat beds, litter boxes, towers, and space pods. Clear Design: The transparent dome cover is mainly used for a DIY cat/dog nest or with a beautiful flat frame, hammock, and climbing edges, making it an exquisite and functional space. DIY accessories for cats! Premium Material: The clear cat bowl fence perch is made of high-quality acrylic material, supporting weight well and providing high resistance to bending, compression, and falls. Excellent Workmanship: The planet has a fine, round brim with no warping, ensuring a durable and perfect position fit. Offer pets a spacious and cozy place to rest or play! Product Features