The 30D hight density pure foam makes this stairway more stable when your pet is walking. The rebound foam stairs are stable and resistant to deformation, anti-slip design on the bottom surfaceproviding strong support for your pet during walking and protecting them. Dog Steps For Bed/Sofa, Non-Slip Pet Dog Steps For Small Dogs And Cats, Dog Stairs With Washable Cover, 3-Steps High Density Foam Dog Ramp, Grey,Dog Steps For High Bed Climbing,40X59x40cm Archie & Oscar Size: 35cm H x 55cm W x 35cm D