About This Invincible upgrade in 2020! As the original design supplier, we are fine with the competitors to plagiarize! But Please Do Keep the Every Professional Details Not Only the Outside Shape COMPARISON 1-OURS: Extra Metal Wire Netting(removable) above the bottom tray so bunny will not standing on their poop. Super easy to clean your rabbit house COMPARISON 2-OURS: 1.8'' depth thicker plastic no leak tray. OTHERS: 1.4'' depth cheap plywood/metal tray that will leak and plywood will easy go mouldy COMPARISON 3-OURS: Extra SLIDING DOOR can be open/close to separate the up & down area. OTHERS: No sliding door at all ! Bunny will mess up and makes clean difficult COMPARISON 4-OURS: Stronger stainless steel casters & exclusive latches & high quality metal open roof hinge for longer usage. OTHERS: Much cheaper small plastic casters, wood latches & wood hinge which are easy to broken The Wood Is Fsc Certified Overview Brand : Aivituvin Product Dimensions : 40.6'L x 26'W x 37.6'H Gap Size : 24 months Material : Metal, Stainless Steel Specific Uses For Product : Indoor