The lower cave runs 19 in wide with doors at both ends, so a cat can pass straight through instead of turning around inside; a smaller 9.5-in cube cave sits above it for a second animal. Two round 12-in platforms and a large top perch complete the climb up 52 in. Each layer carries 22 lbs. Sturdy sisal posts handle claws. The base is 19 in square and the tower weighs 31 lbs. Sponge and plush over engineered wood keep the surfaces soft; a user manual is included for assembly.