KATRIS Modular Cat Scratching Blocks Multi-functional & modular: turns into a scratchable bookshelf, coffee table, shoe rack, sitting area All materials: 100% recyclable; zero waste; all non-toxic materials Extremely durable & sturdy: could holds up to 300 pounds Shred-Resistant design and longer lasting for scratching, exercising, climbing, and sleeping Each block comes with: 2 clips (to secure blocks to each other) & 1 bag of natural catnip