1.【COMFORTABLE MATERIALS】This cat tree frame uses Teddy velvet to make the carpet. Teddy velvet is easier to clean, resistant to abrasion, and has the function of keeping warm.1 X 6" Inline Smart Controller Duct Fan 1 X 6" Carbon Filter 1 X Grey/Black 6-inch Flexible Ducting 3 X Stainless Steel Clamps 1 X Grow Room Glasses 2 X Lifting RopesVentilation Kit Inline Duct Fan Carbon FilterRelease Nature Instincts of Cats: The cute trouble makers who love climbing and chasing can't miss this cat tree! The hanging furry ball(with a replacement) and rope will drive them crazy!2.【LOVELY AND LIVELY DESIGNS】we designed the distance between each floor that cats can move around and considered the path that cats can climb, so that both big and small cats can climb and jump in layers. In addition, most cats like to stay in high places, we added a cat perch bed at the top so that the cat can lounge on it and look down on his / her territory.3.【STRONG AND STABLE 】The cat tree frame uses thick density board on the board, which is relatively heavy and can increase the stability of the cat climbing frame. At the same time, due to the relatively high density of the board, it is very hard and not easily damaged.4.【PROTECT THE FURNITURE】 The posts of the cat tower are completely wrapped by natural sisal rope for cats to scratch. We use a thicker rope, woven very tightly wound, more durable. cat activity tree help prevent your cat from damaging carpets, furniture, curtains, and more by giving them a fixed area to play or scratch.