Wellbro&reg; Pet Best Cat Tunnels Toy 3 Holes Kitty Foldable Play Cube, 16&times;16&times;16 Inch, Color May Variety Dimension: (L x W X H) 161616 Inch , hole diameter: 8 inch. Easy to keep clean and folds up for easy to storage, Material: canvas. This pop out kitty play cube will provide your cat with hours of play time. Connect to additional cubes and tunnels with velcro, easy to take anywhere. The cube have a play tassel inside, keeps cats entertained for hours, perfect for curious cats