Kids' Station Outdoor Water Works Sand/Water Trough - Surface Mount With PumpOverall size 11 3 x 24W. Surface mount table heights are 28, 23 & 18. Components are made of specially formulated recycled HDPE plastic based materials that will not rot, crack, peel or splinter. HDPE (High Density Polyethylene) is impervious to insects and bacteria; requires no maintenance; is non toxic; and is unaffected by severe weather or direct sunlight. The easy to clean surfaces never require painting or sealing and are mold and mildew