DO NOT BUY THIS FROM WAYFAIR!  BUY FROM AMAZON! I bought this item from Amazon a couple of years ago; my cats love it and fight over it so I decided to buy a second.  The screw/bolt is WAY TOO SHORT and the top "ball" piece CANNOT be attached to the bottom "stand" because it doesn't reach the hole.  I messaged the seller with SPECIFIC LENGTH REQUIREMENTS.  He/she sent me the EXACT SAME LENGTH OF SCREW/BOLT and now Wayfair is making me pay $42 to ship this item back.  SO IRRITATED!!!!  Save yourself some frustration and money and buy this on Amazon!