STURDY & SAFE: Made of solid particle board to keep it strong and stable. Non-toxic and pet friendly.THREE DENS: Includes three dens, two connected by a passage on the middle level. The third den offers a perfect place for indoor cats to hide away. Added fun with inner hanging ball.OBSERVATION DECK: Top observation desk has a soft snuggly covering. Your cat can snoozer while keeping an eye on things.FURNITURE SAVER: Scratch barrel outside covered with high quality natural sisal. Your cat can scratch away without causing any damage to your furniture.DIMENSIONS: Ф38x70Hcm. Each Open Hole Size: Ф17cm. Suitable for cats under 3kg.