Don't bother with this one. I purchased it and had it delivered to my grand daughter's house for her new kitten. It arrived promptly; parents put it together no problem, but a little lean on it by a 4 year old broke the bottom support board in half before the kitty could use it. Piece of junk.  I was going to attach it to plywood, but the carpet and jute is all frayed and coming apart also; you'd think it was used not brand new!