1.Multi-layer design: double open hole top and bottom fully enclosed space to give your cat enough security, with fun fur ball toys hanging inside.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 FilterThickened Sisal Pillar: The pillar is tightly wound with strong thick sisal rope, which is strong and wear-resistant without flakes and has a comfortable claw feel, allowing cats to sharpen their claws to their heart's content and helping them to gradually develop a good habit of sharpening their claws. 2.Sitting Stool Tree Hole Cat Climbing Frame: This is a solid wood material you can move anywhere you want, take your little cutie with you and never worry about leaving it behind when you go out.3.Multi-storey stool: this is a fine piece of furniture, solid and reliable, with a high quality plush fabric that is warm and non-shedding, giving your cat a personal touch.4.Intimate Cat Tree: the velvet bowl-shaped suspended cat tree for indoor cats fits the cat's curves, and the two semi-enclosed design plush litter is designed to keep the wind out and keep the cat warm, with plenty of space to give the cat a comfortable, skin-friendly and delicate feeling to enjoy a comfortable nap.