Post size: width 7 cm, length 34 cm. [Suitable for most cat posts] The cat scratching post is suitable for screws with a diameter of 8 mm (M8). If your scratching post or scratching post uses these types of screws, then you can choose our Repalcement poles. [Natural Material] The cat scratching post is made of thick cardboard tube and wrapped with natural fibrous sisal. [Easy to assemble] Compared to buying ropes and wraps, our products not only wrap it more tightly, but also save time. Sturdy Structure The cat tree refills are made of sturdy cardboard tube and wrapped with natural sisal rope.